Malicious PDF — malware analysis report

Static analysis result for SHA-256 a502204552b2ce7e…

MALICIOUS

PDF

97.4 KB Created: 2020-09-06 09:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ebbaca58c20a461e083d23dbb3fa9969 SHA-1: da581433fe1a1e61e1899f2ed7f376876c8fa2a8 SHA-256: a502204552b2ce7eec7b9185fe038b4417ce79fd60a90529e9717b1f46c90a44
162 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to download or view content. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. The presence of numerous external PDF links, as flagged by PDF_SEO_LINK_FARM, further supports a malicious intent to distribute potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=tamilrockers+hollywood+movies+in+tamil+hd In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7433/8472/files/nolemivosodot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/emulator_ps2_android_bios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0292/1111/files/fidalinegubomekatow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/81709512400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/jurnal_psikologi_behaviorisme.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8a419d_67cb6882b1a040b89056ed2edae0ce8e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/18776243643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8009/5646/files/dexakagupugadobavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/72229408359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7105/2707/files/wanugokawodaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/drama_brilliant_legacy_subtitle_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8040/8474/files/coming_out_on_top_amos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1089/9624/files/baby_day_out_full_movie.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47B 5236 bytes
SHA-256: d9fd75a99338e4585cf14811933c786cc19a4f1f03f8475b728549fcfa1f975f
font_01_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 8144 bytes
SHA-256: 5365cbd47af44c1957a500080a72a2de8227e2f6e6adf564bac3f71c3a30f5c7
font_02_sfnt_off00010c66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C66 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_03_sfnt_off000117c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C1 1716 bytes
SHA-256: 7314a8110a688275e79cb4cd5cd058a9f858becaa7f01fde0a687197ddc85302
font_04_sfnt_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 14800 bytes
SHA-256: 07d0a88600bb937c7cfba18ac7bf8f35e3eb2a353e810c9a21f4f107363b6dc3
font_05_sfnt_off00014eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EEF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_06_sfnt_off00015cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CEF 7316 bytes
SHA-256: 056fe315377fc5216ca17e03b680382293c6226764c1bb4c2ddafa05433162b9