Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eeb7947d6dae1c4…

MALICIOUS

PDF

32.5 KB Created: 2020-08-21 08:13:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6529e797998ca87563627fc5b8b1f9d SHA-1: f359430014f074f13d28d503d196167e77fd0cdf SHA-256: 5eeb7947d6dae1c4d672c2f3648a127e0f7428f9e38f566a9a847900665c1619
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a weather report to mask the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the primary malicious URL. No scripts were extracted, but the PDF structure and malicious link strongly suggest an attempt to redirect the user to a harmful site.

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.com/pify?keyword=coeur+d%2527+alene+idaho+weather+report
    • http://files.aaroncalafato.net/uploads/1/3/2/6/132681245/tipoxinumokufifonexi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3057/6278/files/zozepofejojisowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0309/1876/files/residential_lease_application.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/physics_formulas_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/manav_bharti_university_aicte_approval_letter.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/gogewudakimuxovofateveti.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/roland_buck_iii.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/34608476125.pdf
    • https://cdn.shopify.com/s/files/1/0461/3744/2457/files/33260754729.pdf
    • https://cdn.shopify.com/s/files/1/0441/0087/8488/files/xeloxidut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5435/files/11765467663.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/59123860325.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_off00004531.bin
ce4cd29d8f6da2586fcae976cd7957598147a17ab662a62ecd9b8fd0245c8c1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4531 4900 bytes
font_01_sfnt_off000055e5.bin
50a407133c59d875e8a9aff7dbb7218f8cdbb1aeb72843f9cf92ccafa5b6d6b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x55E5 9184 bytes