Malicious PDF — malware analysis report

Static analysis result for SHA-256 653427c1f66786c4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-21 01:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e736346c731e5cf0b07542ca9e3bb5ab SHA-1: 69a6d91c9511bd7bc046196409b00e4b55dac8cb SHA-256: 653427c1f66786c4905ff13a2d2eec69d7550455f043e14a48eb0e24a5242579
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'wallpaper hd nature for android' and the malicious URL, suggesting a lure for users. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

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.cc/pify?keyword=wallpaper+hd+nature++for+android
    • http://files.annaslens.com/uploads/1/3/1/8/131872017/tasuwabur_pawasavaluved.pdf
    • http://files.creatify.media/uploads/1/3/2/6/132682913/datanakilelodo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/91139538326.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/nokobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/clipsal_saturn_switches.pdf
    • https://cdn.shopify.com/s/files/1/0444/2944/3238/files/ffx_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/zejijix.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/44697404650.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sebifoxof.pdf
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/airtel_money_old_version_app.pdf
    • https://cdn.shopify.com/s/files/1/0432/1548/7133/files/lolepofowuxubagewapu.pdf
    • https://cdn.shopify.com/s/files/1/0447/9506/8565/files/ortopedia_y_traumatologia_silberman_descargar.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_off00005b5c.bin
726f268624243763e5a0487acf659ba036d029566a62a2650ad510ef9854f3b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5C 4964 bytes
font_01_sfnt_off00006c45.bin
f55d86d658db3d02e87886a69227221c83941fc0df2d907e368b417fd5fdc333
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C45 10060 bytes