Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6193a98f71db45…

MALICIOUS

PDF

42.4 KB Created: 2020-09-21 00:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca8d5dfe576892bb791c6f184c4e7d2d SHA-1: 750404809998fd4283266e9d6a6db631a0d815b0 SHA-256: 6e6193a98f71db45bedd89fc87e7e8ee18ee0bb57760b1d1345690cd10afda0b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to harmful websites. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to disguise malicious activity as legitimate content. The presence of numerous external PDF links further indicates a link farm or spamming operation.

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.me/wix?keyword=bulls+in+the+bronx+hidden+lyrics
    • http://files.oxygenparts.com/uploads/1/3/1/1/131164324/9324712.pdf
    • http://zuzewovu.indistressco.com/uploads/1/3/1/6/131606113/6873059.pdf
    • http://files.ontcmc-comc.com/uploads/1/3/1/4/131406544/kamipan_ganab_zebafapifomad_lisojagugu.pdf
    • http://fenusi.robmartinmarketing.com/uploads/1/3/1/0/131070792/fodolikipixi.pdf
    • http://files.minnesotaswimcamps.com/uploads/1/3/0/8/130874474/a9059.pdf
    • http://files.wlnhockey.org/uploads/1/3/2/6/132695280/3991318.pdf
    • http://files.sapphiredobermans.com/uploads/1/3/1/4/131453395/c16ea.pdf
    • http://files.gratiotfarmersmarkets.com/uploads/1/3/1/6/131637896/finoxaminimufuziga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0481/3157/1879/files/runofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4010/files/robert_fitzgerald_aeneid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0314/9477/files/burleigh_county_property_tax_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/4916/4693/files/67489115905.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/15066743882.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/beeman_air_rifle.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_off000067a0.bin
c1780c14d2fa3b21effaf649f84ceb63911d56feee84592c56299bd693b8f957
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 5176 bytes
font_01_sfnt_off0000793f.bin
1b46ace62cbd78d8198714fc13ab3dcec741cddae7cddf4211b9f9ee12fd8782
pdf-font-stream PDF embedded font (sfnt) at offset 0x793F 10396 bytes