Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3301fa6fd15ef4…

MALICIOUS

PDF

40.4 KB Created: 2020-08-07 12:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5556efb415b765acffe13904596c6c06 SHA-1: 84ae01d3eaa753e540cad34436c9f14728881b9a SHA-256: 0e3301fa6fd15ef481e4674a21b308a4911cb6cda8d3422d630752eef9139df7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/wb?keyword=how%20to%20assess%20authentic%20learning%20pdf, is flagged as a malicious redirector. The document also exhibits characteristics of an MFA or one-time-code harvesting lure, indicating a phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to phishing sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/wb?keyword=how%20to%20assess%20authentic%20learning%20pdf
    • http://files.abyss-scuba.net/uploads/1/3/1/8/131856166/bidekoreza.pdf
    • http://files.handcraftersbarn.com/uploads/1/3/1/6/131607407/7379177.pdf
    • http://files.greensplendorlandscaping.com/uploads/1/3/0/7/130775384/710916.pdf
    • http://files.waods.net/uploads/1/3/0/8/130814245/6108141.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/bebafuranale.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/35485998445.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/44453112237.pdf
    • https://cdn.shopify.com/s/files/1/0431/8537/3333/files/76522476404.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4760/6679/files/watch_men_in_black.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0449/3528/2856/files/exit_hesi_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/61684846810.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/18391867032.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/encyclopedia_judaica_vol_1.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_off0000609e.bin
9dacef38bfc340666f82131f7660141fad4a3600008629c5a07dd92705aa2ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 5468 bytes
font_01_sfnt_off00007343.bin
69155035a0f4e6a74f870913b677224b6ee420e3278c6a364bdfb912ef9483a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 9884 bytes

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