Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aea83b4deac2043…

MALICIOUS

PDF

66.8 KB Created: 2020-08-25 13:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efb62533583b9c89c281257233965562 SHA-1: 1a2e26f933dc03256d00496f4627237f47526120 SHA-256: 0aea83b4deac2043f46ec7bb0e6b8a209a6816d5bdb839afd70960397ef07418
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=aliens+vs+predator+2004'. It also exhibits characteristics of a PDF link farm, with numerous external links, including a benign-looking Shopify URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the redirector link suggest an attempt to lead the user to malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=aliens+vs+predator+2004
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/skf_spherical_roller_bearing.pdf
    • https://cdn.shopify.com/s/files/1/0439/8101/3150/files/cydia_app_link.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/65295272484.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/introduction_to_geometry_proofs_desmos_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1275/files/jean_baptiste_say_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0434/0016/7589/files/24786106226.pdf
    • https://cdn.shopify.com/s/files/1/0435/9821/7378/files/chemistry_11th_book_samacheer_kalvi.pdf
    • https://cdn.shopify.com/s/files/1/0446/8060/9945/files/online_ocr_converter_to_jpg.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_off0000ba9d.bin
77760f00a6490e16f4bd2032490ad39f3b2e1d06ef9e0ccc27d25763dbaf88a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9D 5364 bytes
font_01_sfnt_off0000ccee.bin
119bf90f9ac0f36dbb3078148f58c27955863a83f1949be15b07c485c965037f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEE 16076 bytes