Malicious PDF — malware analysis report

Static analysis result for SHA-256 440a82b4c75a04e1…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 18:46:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f1b2f0ef60f9a6b44c0e4ac4896131 SHA-1: 6fe210b93155f8b907ac411a089837bf73ee34f3 SHA-256: 440a82b4c75a04e150b8399298f9a9bad6c5f61ac1ae037c2b5f78d872de1085
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link and a large number of external links, suggesting a link farm or SEO manipulation tactic. The document body contains the URL 'https://ttraff.cc/pify?keyword=after+book+online+pdf', which is a known malicious redirector. The presence of numerous shopify.com and other file-hosting links indicates an attempt to distribute content or lure users through a large number of external resources.

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=after+book+online+pdf
    • http://files.paulsumich.co.nz/uploads/1/3/1/3/131398547/tufegujak.pdf
    • http://files.mamdouh.co/uploads/1/3/1/3/131379054/ronir-lefisasepi-zotog-xexewida.pdf
    • http://files.chelseanswagner.com/uploads/1/3/2/8/132815791/d81ed.pdf
    • http://files.northrouttpreschool.com/uploads/1/3/0/9/130968994/tomotirewekawo.pdf
    • http://files.greatwesternlandscaping.co.uk/uploads/1/3/0/8/130813692/4299347.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/rifemokaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/sogadomixolemizolunev.pdf
    • https://cdn.shopify.com/s/files/1/0432/6529/4491/files/faxirele.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/xilivuvovirisazugupuradez.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/bikipuzes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6151/8231/files/50983864629.pdf
    • https://cdn.shopify.com/s/files/1/0437/0772/8023/files/lovesulepirake.pdf
    • https://cdn.shopify.com/s/files/1/0438/9496/4392/files/big_bus_budapest_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/tukizolitiluxodigagizo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/dumimevunig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwisosipopiwusanitilowaz.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd9.bin
5fe7fb1e890633f6f5d182ed34147dcea5713a68525e291f3edd80cb55daebae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD9 4840 bytes
font_01_sfnt_off00008059.bin
7d195c9b3033ed5ccbae10569b20759f9f29989b44b996d73d07418da3833a68
pdf-font-stream PDF embedded font (sfnt) at offset 0x8059 10464 bytes