Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ee9dbcf510885c…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 15:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a74a0a0341b19a8741ddbc0348096cdd SHA-1: 45f53764eaf6b5a578270d2f3d84b280e05d43ba SHA-256: 88ee9dbcf510885c195cd5b8eaddfef5be42a93d1c232098053bf03ad12b7885
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.ru/pify?keyword=baarish+bilal+saeed+audio+song In PDF document text
    • http://files.socialstudieswithwarsaw.com/uploads/1/3/0/7/130775677/2852757.pdfIn PDF document text
    • http://likine.sidemountainspecialtyfoods.com/uploads/1/3/1/4/131438216/50a923.pdfIn PDF document text
    • http://files.bodypotionsbytamara.com/uploads/1/3/1/4/131453283/najej-xalugelarej-xorubuvowizuv.pdfIn PDF document text
    • http://files.suilah.com/uploads/1/3/1/8/131857193/dajakedi_venugenod_sabifenuzigip_muzisoxe.pdfIn PDF document text
    • http://madala.historiaflorals.com/uploads/1/3/0/8/130814124/31634.pdfIn 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
    • https://cdn.shopify.com/s/files/1/0432/3383/7224/files/nesebasoxinerajib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/simple_spoken_english_sentences.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3553/3218/files/jitaretofupif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/building_construction_illustrated_francis_ching.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/16318302960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8253/8403/files/co_operative_housing_society_bye_laws_in_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/bass_guitar_scales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/pisufababejela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3365/6476/files/job_application_letter_sample_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1814/1347/files/newivinetodeladidisoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/kiiara_gold_mp3_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/52539876604.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000583a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x583A 5276 bytes
SHA-256: 4437d7f8c3765714ad6bda9dcd6c13994850b8c502078be3391fde1285e8cae6
font_01_sfnt_off00006a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A18 2540 bytes
SHA-256: a0a970043ee3cc86c32f954ef3ad271793525d218c9206bfbca3105aa5a8963f
font_02_sfnt_off00007509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7509 15024 bytes
SHA-256: 29fe467a41bba186d6fc2f106847c582b7295ab75942172e8c81f6ddf032efd0

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