Malicious PDF — malware analysis report

Static analysis result for SHA-256 09742ff315ff5785…

MALICIOUS

PDF

36.4 KB Created: 2020-08-18 13:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aade0a99c6052ed36c4e239a916f1928 SHA-1: 2d599076ca97a06bb313fe83f4db2523f99fcd8a SHA-256: 09742ff315ff5785398bc3cb889c8d342be4b86c627ba0e322955b0aaaf35c06
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=alljobalert+emitra+form. The document body also contains this URL, suggesting it is intended to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious.

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=alljobalert+emitra+form
    • http://files.garethworthington.com/uploads/1/3/0/7/130775391/8614224.pdf
    • http://files.foodidude.com/uploads/1/3/1/3/131382808/farojo-figetenokixevu-liriroxilupewu.pdf
    • http://files.livingwellstudios.com/uploads/1/3/2/7/132740685/7272374.pdf
    • http://files.handacarpetofhickory.com/uploads/1/3/1/4/131438190/950106.pdf
    • http://files.cateringandcreations.net/uploads/1/3/0/8/130814513/9295549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/bhagavad_gita_full_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0428/0867/2423/files/nafelum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9582/5314/files/dewur.pdf
    • https://cdn.shopify.com/s/files/1/0437/3898/8709/files/adnan_sami_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/87577102286.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2156/files/alegreya_sans_font_family.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/fimirepabazotituxebukaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3899/files/tajarozawimizadepuse.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7599/files/3348598889.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8266/files/33016587508.pdf
    • https://cdn.shopify.com/s/files/1/0437/4023/3880/files/99945269127.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_off000052b3.bin
7e2dc426d7b09f8cd7682659ac93bc94a4c19413e0aa351910f0cdc0c98b6a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B3 4940 bytes
font_01_sfnt_off00006368.bin
11e9fa6a29cfd809428381c587648eac5632db5e72f090e214985a338bfa976c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 9712 bytes

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