Malicious PDF — malware analysis report

Static analysis result for SHA-256 11162bee74e5be06…

MALICIOUS

PDF

52.4 KB Created: 2020-08-05 11:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5fb26159f6aa68ee6b69ca53681573c SHA-1: 2945ac8ed965af827d2b49020ca6b4ac1e533081 SHA-256: 11162bee74e5be06d4b08c30a1d095038abd4c6799dcb4172edc78dc4163a2e9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting an attempt to lead the user to a harmful site. The document body, though partially corrupted, contains the URL 'https://ttraff.ru/pify?keyword=autocuidado+y+calidad+de+vida+en+el+trabajo+pdf', which is also flagged as a malicious redirector.

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=autocuidado+y+calidad+de+vida+en+el+trabajo+pdf
    • http://files.spoton-marketing.com/uploads/1/3/1/4/131452922/bipunuvegobubube.pdf
    • http://giviv.ngm2016.com/uploads/1/3/0/7/130775045/8910435.pdf
    • http://files.annemariemarcinek.com/uploads/1/3/0/7/130775921/6962878.pdf
    • http://files.joinzombieclub.com/uploads/1/3/1/3/131384468/ponikutigokeza.pdf
    • http://files.kickass-stainedglass.com/uploads/1/3/1/4/131453421/9282378.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/pupuwolik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/30423311642.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/nebutilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/zoniwopari.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/kokunujuzetogaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/xidewajulufixonizebuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/96325969280.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/dosoweguzukesemol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/losum.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/93913781747.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2610/files/vegukuwidepil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/72630308820.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d27.bin
5d18357d544932012e8b04afdd65e879a7cb87baa46891769f67f19aa35af4b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 5220 bytes
font_01_sfnt_off00008efe.bin
37ad19ba4d8d9b04b5029552eae09ab428906b2c970b2c5dda204194dab833fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 11324 bytes
font_02_sfnt_off0000b3aa.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AA 4324 bytes

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