Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f10aa50d2c6820…

MALICIOUS

PDF

47.2 KB Created: 2020-08-21 15:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f652101b6ec784979425921bac541f9a SHA-1: 96e3d3f2cac86b254108680b0c67f226989d8f94 SHA-256: 97f10aa50d2c6820663488e820e7188b3eb3a5667149af8c4b74c106027e5339
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=beverly+hills+90210+episode+guide+season+9', is flagged as a malicious redirector. The presence of numerous links, many hosted on Shopify but likely part of a broader SEO manipulation scheme, suggests an attempt to lure users to malicious sites through deceptive content. No scripts were extracted, and the document body is heavily obfuscated, but the link farm and redirector are strong indicators of a 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.ru/pify?keyword=beverly+hills+90210+episode+guide+season+9
    • http://tezofazag.opalfund.org/uploads/1/3/1/3/131379833/kuzobife_rojoganuto.pdf
    • http://revix.sommerflooring.com/uploads/1/3/0/8/130873995/8877774.pdf
    • http://files.discoverygame.org/uploads/1/3/2/6/132695460/gudufalu_megonebo_zakupovijux.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/52463928378.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/jetepejulagerijerefape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/77928862038.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/41370894213.pdf
    • https://cdn.shopify.com/s/files/1/0436/6408/1046/files/10742791432.pdf
    • https://cdn.shopify.com/s/files/1/0438/0481/9613/files/32317691672.pdf
    • https://cdn.shopify.com/s/files/1/0434/5354/6656/files/english_aptitude_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/gixev.pdf
    • https://cdn.shopify.com/s/files/1/0437/9167/9639/files/apple_boot_camp_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/fevitowadijuwew.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078fa.bin
5879e09f17164164535054bc162969c2ee8e761cee1b91e64212e8a964bb6716
pdf-font-stream PDF embedded font (sfnt) at offset 0x78FA 5916 bytes
font_01_sfnt_off00008d1f.bin
a93b767792f2d584b418965d8c017d46080bc1d5958173182f49bb08a9118fa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1F 10180 bytes