Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce336b5b9940afa…

MALICIOUS

PDF

62.7 KB Created: 2020-08-21 14:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bd407b07d19ab4fe09e17d1b53494a8 SHA-1: a80c833d0e162762eea2aa4304465bd8726fa7bd SHA-256: 6ce336b5b9940afabba9d3a2dce905dca8b0f7aa236372be59f5fdf5387382e6
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL related to 'Fallout 76 tadpole exam answers'. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDFs hosted on various domains. While no scripts were explicitly extracted, the presence of malicious redirector links and the SEO link farm pattern strongly suggest an attempt to drive traffic to malicious sites, 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.ru/pify?keyword=fallout+76+tadpole+exam+answers
    • http://funorofaz.ripeta.com/uploads/1/3/0/9/130969627/zupagikaruzam.pdf
    • http://files.grandlakesnowmobileclub.com/uploads/1/3/2/6/132695360/1622851.pdf
    • http://luzar.gianatiempogallery.com/uploads/1/3/2/8/132814930/bazulo.pdf
    • http://files.countrymeadows2.com/uploads/1/3/1/4/131438019/4362120.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/bazaart_full_apk.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/rejajiludidipupetab.pdf
    • https://cdn.shopify.com/s/files/1/0451/1229/5589/files/dosesekebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/luxasisubivesexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/positional_vertigo_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/96363751355.pdf
    • https://cdn.shopify.com/s/files/1/0435/6875/8943/files/85537200823.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/lujigukimavu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5180/0981/files/maloveg.pdf
    • https://cdn.shopify.com/s/files/1/0437/6975/7850/files/37273601257.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_off0000b6de.bin
7efd78277338297608ac0de24303387850e858a0993fb40424713cecf346c360
pdf-font-stream PDF embedded font (sfnt) at offset 0xB6DE 5452 bytes
font_01_sfnt_off0000c96c.bin
e9ad09e91a8f845328f961b29169e41ae10464a88677c8daeb8cb669e6850237
pdf-font-stream PDF embedded font (sfnt) at offset 0xC96C 10552 bytes