Malicious PDF — malware analysis report

Static analysis result for SHA-256 71abc3889faa13cf…

MALICIOUS

PDF

42.1 KB Created: 2020-08-21 03:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba67fd6e8a195233beb550f9a30c74ee SHA-1: e1d8dda728c0131f9f7e9ee9dea3c4c816ea1598 SHA-256: 71abc3889faa13cf91cb28e79368ceede9c21f7b7d90033a59de5e5223be4726
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to distribute SEO-optimized PDF files. One prominent URL, "https://ttraff.cc/pify?keyword=literature+review+on+social+media+marketing+pdf", is identified as a malicious redirector. This suggests the document's primary purpose is to direct users to potentially harmful content or phishing sites, masquerading as a literature review.

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=literature+review+on+social+media+marketing+pdf
    • http://dewebe.americaninspections.us/uploads/1/3/2/7/132712315/3158534.pdf
    • http://tijiraxo.positivelyobedientcanines.com/uploads/1/3/0/8/130814328/tazidewadinaxu_nesojiruvab_tibomux_nopopilopak.pdf
    • http://files.ripples.us/uploads/1/3/2/7/132740277/bufunuvadisozamer.pdf
    • http://files.brissaeden.com/uploads/1/3/0/7/130775772/fazobiberupopobisoxo.pdf
    • http://files.authorrobertmuir.com/uploads/1/3/1/4/131407435/kozufetexoxoto-zenupeterim-retasedatodam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4985/1811/files/9312899220.pdf
    • https://cdn.shopify.com/s/files/1/0432/8020/3944/files/12276737281.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/epilepsy_and_the_functional_anatomy_of_the_human_brain.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/61729375410.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/36375722416.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/marine_steam_boilers.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3693/files/fascia_de_camper_y_scarpa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2630/0575/files/60405954443.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_off00006548.bin
2f881cbab968761d58fa393fc8a0cb1ff211f44653ee1024c53799c4b8e24cc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6548 5632 bytes
font_01_sfnt_off00007873.bin
b9b0cc18aa903ba744c0d060916bb5f5127b88e49ffe5a6301c8e6794afd2157
pdf-font-stream PDF embedded font (sfnt) at offset 0x7873 10560 bytes