Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94f4e544fbc2e91…

MALICIOUS

PDF

53.3 KB Created: 2020-07-24 13:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 6de65a8a8371781569371ed6198b5bd6 SHA-1: 181e2db576767ceb54c7bfa32cfb2028926926d9 SHA-256: e94f4e544fbc2e915e745051a69c25faf5089bb52b1a03daaacab37fab3359ad
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to an academic topic. The presence of numerous external links suggests a link farm or redirection strategy to distribute malicious content.

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://ttraff.cc/wb?keyword=educational%20philosophy%20of%20rabindranath%20tagore%20pdf In PDF document text
    • http://files.yourlovespells.com/uploads/1/3/0/8/130813829/1371723.pdfIn PDF document text
    • http://files.shueyvillechurch.org/uploads/1/3/0/7/130740524/7988078.pdfIn PDF document text
    • http://files.farmacybotanical.com/uploads/1/3/2/3/132302973/xutitogesafa-lixoreriberexik-larowuwonubola.pdfIn PDF document text
    • http://files.idahocivilwarvolunteers.org/uploads/1/3/0/7/130739274/nasepevizagu_fevutajuzu_diwetavid_nalixese.pdfIn PDF document text
    • http://files.tokillacoyote.com/uploads/1/3/1/1/131163761/b6614842df.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/7073624941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/zunedeturakogatuzidejegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4595/2408/files/96958373825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/44642423722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/minepedisekujed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/kopimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/xosadapepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/3676752988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/sinotarisojamuzegowebiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/25041519062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/dukeredameganiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/40574250335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/41502993724.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000937f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937F 5496 bytes
SHA-256: 2f87275afe37bfa8cc3182755a740640f966024d1ac8344b2faddb1e4a9e20de
font_01_sfnt_off0000a624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA624 9760 bytes
SHA-256: 9e50ea5834955eef40c65bd5d5dadd6684c8c01e3e31e76ab1832b1cbf880ce6

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