Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c00e6d9a1767095…

MALICIOUS

PDF

44.8 KB Created: 2020-08-07 17:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9cfc7ebae75a1363852122bcb52a567 SHA-1: c4ef84eea385c0e53a04a8af64881f9f4ef4d1ad SHA-256: 6c00e6d9a17670955875a475528ca2b9ddc30c4f7c7cca6d1b8c9642910c07b8
162 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading a PDF. The presence of numerous links to external PDF files, many hosted on Shopify, suggests a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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.
  • 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/pify?keyword=catechism+of+the+catholic+church+ccc+pdf
    • http://simobiz.focusfivedesigns.com/uploads/1/3/1/4/131437987/zoxanujoxumebe-vopibaruku-xawavubiziwup-jotizeziko.pdf
    • http://files.cantatrice.ca/uploads/1/3/1/6/131637016/razob_refulipodorusu_kuxojixezidu_gulew.pdf
    • http://tajigoje.osspto.org/uploads/1/3/1/4/131437792/mujazagivudofijakege.pdf
    • http://files.golfinaround.org/uploads/1/3/2/7/132740552/diseposezor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7650/2175/files/rosisibusatavasige.pdf
    • https://cdn.shopify.com/s/files/1/0438/1153/7053/files/83667290011.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/18475102677.pdf
    • https://cdn.shopify.com/s/files/1/0431/8075/3058/files/navalomikiribi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/koxanoxiwegob.pdf
    • https://cdn.shopify.com/s/files/1/0435/5745/3985/files/bank_treasury_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/brave_new_world_aldous_leonard_huxley.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/rodojav.pdf
    • https://cdn.shopify.com/s/files/1/0433/5029/4678/files/bozidezizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/23287462788.pdf
    • https://cdn.shopify.com/s/files/1/0438/4132/3170/files/nelefabup.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/netogerobomovoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8900/1638/files/sopizumud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e8.bin
ab719dc1d22338d86f47b4b8ea4f0c93b0701a899150780d8f94ff3eff4c7c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E8 5300 bytes
font_01_sfnt_off000083c0.bin
80a3df4e10108dea222004d011b7c1ce75f9f6cad2a05aefae911fa5f4c42fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C0 9948 bytes

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