Malicious PDF — malware analysis report

Static analysis result for SHA-256 1230d1451a450a8c…

MALICIOUS

PDF

44.3 KB Created: 2020-08-01 13:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9ebdf34a1c10d64104c02578f9ee830 SHA-1: d618bb3c1b9d773aea88e2c14af2ab3355593ac3 SHA-256: 1230d1451a450a8c56df8e9dd33795e9a00bf3c9b5be16b89f7ba699ae022ab7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to a redirector service and SEO link farm infrastructure. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests an attempt to drive traffic to potentially harmful sites. No scripts were extracted, and the document body was heavily obfuscated, but the link farm heuristic is sufficient to infer a malicious intent.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=kubota+mower+deck
    • http://files.goldstripecoffee.com/uploads/1/3/0/7/130738943/bofezebav.pdf
    • http://files.stnectariosgeorgegoc.com/uploads/1/3/0/7/130740429/6871086.pdf
    • http://files.acpl.net/uploads/1/3/1/4/131406736/dovofidipukosev.pdf
    • http://files.devonvintagecarclub.com/uploads/1/3/0/8/130814283/mujula-bibale-pevoxam-meloromoji.pdf
    • http://files.lighthouse100ultra.com/uploads/1/3/1/1/131164052/ae982ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xewujixamugovaginebutomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/52298776878.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/zeniwaxenek.pdf
    • https://cdn.shopify.com/s/files/1/0428/7302/8775/files/serizizovifokisemakokebew.pdf
    • https://cdn.shopify.com/s/files/1/0438/0514/7298/files/allied_universal_employee_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/leluxep.pdf
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/81871365899.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/68811854624.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/xorunugut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/lozibufevenetelaguxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9457/3205/files/sukumuni.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006388.bin
5a25262812b1cae7a950652e4b8fc1005ad796712ad4d1aa678d4d7266de73c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6388 4868 bytes
font_01_sfnt_off00007421.bin
cbd8c5770b34dde94bed26ea9e14a2f1cfeb2c07062eb9497cbc7e1fa91381e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7421 10072 bytes
font_02_sfnt_off0000968c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x968C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.