Malicious PDF — malware analysis report

Static analysis result for SHA-256 035da9726466e82a…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 01:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1fbe932cf000ba195072d89a6918fab SHA-1: eadb3e65ae2c58cfeff48c10e826cb13a8374b82 SHA-256: 035da9726466e82af412ca15aa845dbec025665f51808176da11a206f423816f
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, a common tactic for SEO link farms and phishing. One prominent link, 'https://ttraff.cc/wix?keyword=atlas+de+hematologia+clinica+editori', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of multiple external PDF links further supports the SEO link farm heuristic.

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/wix?keyword=atlas+de+hematologia+clinica+editori
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_72e5dc3d81ea4e6b9e40449014b3c8d4.pdf
    • https://static.usrfiles.com/ugd/e745be_afaf0bfb7ce64d4aad0a46cb9d50ea89.pdf
    • https://static.usrfiles.com/ugd/6c98bc_0708b10ffc2a4dd68a93a9b6c540b8d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7611be48a7a4df19e2892168bd938e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ebabf572332487ba4a4f7712ca3cfcc.pdf
    • https://cdn.shopify.com/s/files/1/0463/4207/8625/files/28758571343.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/mupadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8604/4570/files/97256910597.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/tujuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/76597185819.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/dragon_age_inquisition_walkthrough_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/96134886186.pdf
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/wumuronozoletavorusos.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_off00006957.bin
3da68a2d457b50f5d2ec099059062a6b7ecffd4a4464c1b9fd8dee2665431d83
pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 5340 bytes
font_01_sfnt_off00007b53.bin
5a1d7c9595c8d589f1c21fee871bee205d0438726bb2b2c50a0ba4dec76fa110
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B53 14184 bytes