Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7dc6ad830b0367…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 03:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be4cd5483385945daa76498a50512cda SHA-1: 6ddfeef8bc69fbe6948b84519165e5e2e89fc5c9 SHA-256: 0b7dc6ad830b0367d7b3b1bbe489b1001617e24630f1e92f184cda70c1837d36
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to redirector infrastructure. The primary malicious link, 'https://ttraff.cc/pify?keyword=online+video+editing+app', is designed to lure users with a seemingly relevant keyword. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm intended for SEO manipulation or malicious redirection.

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/pify?keyword=online+video+editing+app
    • http://xetumu.benjamin-lhotellier.com/uploads/1/3/0/7/130775792/56b62674.pdf
    • http://piwup.lesswastelaura.com/uploads/1/3/1/6/131637136/zigotilokujotob.pdf
    • http://files.kuchamberfestival.com/uploads/1/3/0/7/130739693/depalugivi.pdf
    • http://norowoz.liamatera.com/uploads/1/3/1/8/131857914/fukolajokufobanuwuna.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/boxafajoguzajuzalisatolaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/36455980974.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/selutojiliwilapa.pdf
    • https://cdn.shopify.com/s/files/1/0443/2376/6428/files/case_study_houses_elizabeth_a._t._smith.pdf
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/89598565750.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/ruxidixoxof.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/nepobatazut.pdf
    • https://cdn.shopify.com/s/files/1/0432/8495/5300/files/likert_attitude_scale.pdf
    • https://cdn.shopify.com/s/files/1/0435/4798/4027/files/characteristics_of_life_activity.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85947343199.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/37928373307.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2634/files/67898853434.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/nupiwuxowidixokakedifu.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_off000071d1.bin
e7130e2ee6b13bc01ce1af4ef6e37a1cd1a9be96e470c569c19dc02487b073db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 4940 bytes
font_01_sfnt_off000082bb.bin
7490dc2dfeb591c36ec6fb702340b93d3065aa4ed69553db6fcacf91f325e3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BB 10192 bytes

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