Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d0cd8a46e94fa7…

MALICIOUS

PDF

52.9 KB Created: 2020-10-29 05:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 6d8f4b97718bc2491870fbdd546ac247 SHA-1: 7f16021979bc5070360846906c0eefe497a4ebfa SHA-256: c6d0cd8a46e94fa7ba4031df01163b7caf6ec8a25f2aaf9a4b5a557bd496ed0b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation or to host malicious content. One prominent link, 'https://ttraff.com/123?keyword=1992+by+the+center+for+applied+research+in+education+worksheets+answers', is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains this URL, indicating an attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/123?keyword=1992+by+the+center+for+applied+research+in+education+worksheets+answers In PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/7006893.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/7316660.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/7225686.pdfIn PDF document text
    • https://sowubewakojanit.weebly.com/uploads/1/3/4/3/134348505/kexor-ganodano-woxozitavok-zemamekisive.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/dutotetiz_tazekimuz_neziseb.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/gifosesigovekosuko.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/76bde.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/gutosadisoliti-ziviwusariwem-sumizem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7909/3409/files/kodugerepuwuveseligov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc56bf7-6b7e-4bcf-8e56-d8ca18d170c6/tazujego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48c53b6-b3b1-43b9-80f2-f7e8d0542aaf/electronics_lab_manual_volume_2_ka_navas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57a8ca99-5566-4770-8c06-a63cc39474ce/nosup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9376/0931/files/nokow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24b192b3-73e6-4331-8208-1ca600503fc2/vimoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2807/2606/files/29959181758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/9849/8981/files/love_rosie_libro_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e9eb5fd-8318-445b-8d27-a1b96dfbc7ff/mufuselifidiripexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/breast_screening_guidelines_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/unfriend_facebook_friends_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/firebase_phone_number_authentication_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d2fcad-066f-44de-aa5c-4553f00707fa/dipodazuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6677/8295/files/82416080503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3570/4482/files/fakelelakukimiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/basulimama.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000808e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808E 5768 bytes
SHA-256: 375b4ee4a432bde581f9cb463dbfef56d28734125704405f782bfb9620c1d5b9
font_01_sfnt_off0000942b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x942B 10344 bytes
SHA-256: 9e1555c200e25563b38c33b15d45ba0897bb0b710025a33bb6933f4eef3ef96d
font_02_sfnt_off0000b765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB765 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71