Malicious PDF — malware analysis report

Static analysis result for SHA-256 05bcedb792685555…

MALICIOUS

PDF

44.8 KB Created: 2020-09-15 21:30:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bcf1a0dfae56e9e2e8c77c52b46df61 SHA-1: c270cfd186fb604cf7befc12fcbf6b698a857e9a SHA-256: 05bcedb79268555528e02c8a4bac60741fa3577a828e1918cd83159f08e80364
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links, 'https://ttraff.link/pify?keyword=article+4+free+inhabitant+reddit', is flagged as a known malicious redirector. The presence of numerous links suggests an attempt to either manipulate SEO or redirect users to malicious content, aligning with a phishing or spamming attack pattern. No scripts were extracted, but the structure and link farm heuristic strongly indicate malicious intent.

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.link/pify?keyword=article+4+free+inhabitant+reddit
    • http://mavokobun.splchampton.com/uploads/1/3/2/6/132680835/dbbd12a.pdf
    • http://files.clannandrumma.co.uk/uploads/1/3/1/3/131379246/04d5ae3e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/92425763130.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdf
    • https://cdn.shopify.com/s/files/1/0455/3677/2261/files/balancing_chemical_equations_worksheet_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8646/files/xoburerokira.pdf
    • https://cdn.shopify.com/s/files/1/0476/8982/6470/files/zisojuke.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_fb690b88cb7b4c29a4cc3e75733e95d9.pdf
    • https://static.usrfiles.com/ugd/36f25b_6cfc4568164d434f870a14254c27a5ec.pdf
    • https://static.usrfiles.com/ugd/062c90_6d8f3a95873e4f6ab5deb3f794ac36f8.pdf
    • https://static.usrfiles.com/ugd/e49726_9cae5825847843828ca8edfa6664fc50.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_off000064a3.bin
aa964b44e5d45c6f467f1afee21417bcab4eb33def798013814f11cc886d15c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 4828 bytes
font_01_sfnt_off000074f2.bin
a21392bbcdd6bf809dc7216ad45d298e4a1945166816bbdd2a511d319d8c52e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F2 10356 bytes
font_02_sfnt_off0000984f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x984F 4324 bytes