Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ebdf1d8867f7c6…

MALICIOUS

PDF

36.2 KB Created: 2020-08-23 05:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2781e656b38be261fd6afcfdc56262e SHA-1: f6eea68d81c38e15b58e57aeb9d2236913e08efc SHA-256: e9ebdf1d8867f7c6faef6c1be76b5615cbd291698e53c596a73a3e0af0fbdc53
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a known malicious redirector. The document body, though partially corrupted, contains text related to a 'UK passport application form' and a URL pointing to 'ttraff.ru', which is flagged as malicious. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content distribution network being abused for malicious redirection. The ML classifier strongly supports the malicious nature of this PDF.

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=application+form+for+uk+passport
    • http://vupesate.studio-luxe.com/uploads/1/3/0/8/130874457/nokolimofovuwemasuk.pdf
    • http://fuvav.claresscratchkitchen.com/uploads/1/3/2/7/132740328/moluza-jejomuragulop-wusaketome.pdf
    • http://files.danyellscakesandcreations.com/uploads/1/3/1/3/131381612/rebegojirubuso_xegokazifududa_geriviziwir_kiwojarud.pdf
    • http://files.libertystroops.org/uploads/1/3/0/8/130813364/3238981.pdf
    • http://xumivelob.cheerycards.com/uploads/1/3/1/4/131483152/26ee7454e2ed4.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1014/files/wipopalapepigufiremavowis.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/calculus_10e_larson.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/2917845753.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/71230486430.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/tkb_pendidikan_agama_islam.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/17540159429.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4202/files/les_auxiliaires_de_modalit.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/bejuwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/bovukubonutopegikabapixum.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/77590239409.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/14979509357.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/setopujupedamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/54041225647.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/
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/1497950935

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe4.bin
181626198d78aef349fca3cb0f3e81bdac6dcd50797fd4abcb923d11d35f5705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE4 5212 bytes
font_01_sfnt_off00006182.bin
8c01f15158974e61759a6a5e29d54c39c75370f34c9514e839fdd70769780c09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 10168 bytes

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