Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a707c8cddb3a31…

MALICIOUS

PDF

63.1 KB Created: 2020-08-08 16:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c06cd26adeb31ffbf35fe6c26a70eeee SHA-1: 3b2c7443f9b67fdb3b52ed586f48d6d3071b9c76 SHA-256: 81a707c8cddb3a31f3995e8c73a9f5ef17ad076d9e6e1b9112662d7fed198801
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently identified as a malicious redirector pointing to 'ttraff.ru'. The document body, though partially garbled, contains text related to 'Rocefin injetável bula pdf', suggesting a lure to disguise the malicious link as a drug information PDF. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the URL, and the 'SE_URGENCY_LURE' heuristic indicates the document may employ deceptive language to encourage clicks.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=rocefin+injet%25C3%25A1vel+bula+pdf
    • http://files.cpathleticboosterclub.org/uploads/1/3/0/9/130969403/nirexudori.pdf
    • http://files.oregonlumberworks.com/uploads/1/3/1/4/131483148/6199621.pdf
    • http://files.naturaleducators.com/uploads/1/3/2/6/132681479/xuxosawojesabugol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/10201062210.pdf
    • https://cdn.shopify.com/s/files/1/0433/4302/0183/files/ladubabejoziritatoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/30439832589.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/50059262665.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/selenium_ide_automation_testing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/zaremasat.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/mexonitenewitedinugabaruf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/angular_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/85135495756.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/83578223674.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1159/files/jovowabilekufefavizekut.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/3622567216.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/vapisezuruvogovuruno.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_off0000aa69.bin
4b668a1e8a91c27f79d41025dec4ce1610f5ebf51dcf34c6e1d7bdb4a9624f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA69 5272 bytes
font_01_sfnt_off0000bbda.bin
c888390e33500367d8432da30b49729cdccf339960eb313df14752c62b451e38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDA 10352 bytes
font_02_sfnt_off0000df41.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 4324 bytes

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