Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f6d6d5fc5e5b11…

MALICIOUS

PDF

44.7 KB Created: 2020-07-27 18:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aafcfcde4aa35bd163d8db4949930f27 SHA-1: bdc6f3f8f116f7b27ac0933b30c7a339489d8fca SHA-256: 01f6d6d5fc5e5b11afef50c7c221eadbdbb5fba3a0f0812a99ba923542942ccd
162 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to legal agreements, aligning with a phishing attempt. The presence of multiple embedded PDF links, some pointing to benign Shopify URLs, indicates a link farm strategy, likely to obscure the 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=retainer+and+contingency+fee+agreement+template
    • http://files.melancholicmannequin.com/uploads/1/3/0/7/130740323/morazozalunajiv.pdf
    • http://files.littleredschoolhouseberea.org/uploads/1/3/2/6/132681199/1597747.pdf
    • http://files.simonpam.com/uploads/1/3/0/7/130775382/siledinalipe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8615/1834/files/50034062563.pdf
    • https://cdn.shopify.com/s/files/1/0438/6645/6224/files/61391494751.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/126231057.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/solazasezijawojuxaruni.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/49038954295.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/razikeruranofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/38295037422.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/zoraf.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/kajenogakogobapuwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9980/8149/files/77989797185.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/43963439770.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/perojikuzuforopexaxuzuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/niselo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/80035927015.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_off00007046.bin
653ed00df6d6fdc12052527c1d78de9def86b023c6993db7e5a463081bdeb174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 5196 bytes
font_01_sfnt_off000081df.bin
51c4185411ad2db4f594141f847e2e1817db38f40e6bf31d5cab03efaf3ce341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DF 10364 bytes

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