Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1b999cec0cf26d…

MALICIOUS

PDF

50.4 KB Created: 2020-11-01 07:41:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 11a52e4f127784d5ccdc344b153c613f SHA-1: 8d871342bbea079d3efabf31fa13da934551ccff SHA-256: 8b1b999cec0cf26dfba69f57c0644248b5b0fa709fe28108f8137fb1b591a05b
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ggtraff.ru/aws?keyword=mediterranean+lingua+franca'. The presence of a link farm and a redirector suggests an attempt to direct users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/aws?keyword=mediterranean+lingua+franca In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f8f1e3427b7f.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/vekewisinonarege.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/wowizuvimolo-megevifi-pebawonadujiju-badopawaxaxit.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/gadusafaduwogisamoro.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/1712ec03243b7d.pdfIn PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/7531594.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/9d61478861897.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f8bb0d5ccbb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_5f8d0a5df1e73.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://s3.amazonaws.com/xanebavifamopez/como_aprender_ingles_em.pdfIn PDF document text
    • https://s3.amazonaws.com/kimoweworape/xiladinulunubofepedex.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/zepabinodosunogas.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/nirav.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gupulojoxex.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 2

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_off000073df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 4788 bytes
SHA-256: c618b95b0387c73e394de6385e46d3d3fd17faac22294df4f7c9351a2fc65d64
font_01_sfnt_off00008435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8435 13412 bytes
SHA-256: a96f8ff538e2104833ed7e406f70a0fc41f7510569c0371e294ed9a691b05a17
font_02_sfnt_off0000ae6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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