Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ef605953ad780a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 02:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e53d887e6f401c5125f643719b773fbe SHA-1: 2a033c2082b4b89e9f545050d4f520eaa1fa5e36 SHA-256: 71ef605953ad780a81ac6d2be5ec1d5823870704fc8a9980999147cb35aa22bd
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=avast+antivirus++free+for+pc+2017`. It also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector link strongly indicate an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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=avast+antivirus++free+for+pc+2017
    • http://lefebadad.oracareproducts.com/uploads/1/3/1/3/131379808/d47cf61bf6e594.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/fortalecer_autoestima_en_adolescentes_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/newopegagej.pdf
    • https://cdn.shopify.com/s/files/1/0436/0755/6258/files/mipetopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9082/8700/files/abilene_reporter_news_number.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/oriflame_catalogue_february_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/kerur.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/bel_ami_carte.pdf
    • https://cdn.shopify.com/s/files/1/0431/1017/0786/files/73468828295.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0855/files/20217795483.pdf
    • https://cdn.shopify.com/s/files/1/0440/8839/3893/files/95453983416.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/6005/files/rikese.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_off0000631b.bin
6235b1d600df68fadffdcf40a1103b2b4dde192ffbccb9d55a688ac82387dae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 5432 bytes
font_01_sfnt_off000075b2.bin
8f89b33b8b8da06366d14fe83b8b587fbe6156d02f7e7613a058eefccd7a139b
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B2 10192 bytes