Malicious PDF — malware analysis report

Static analysis result for SHA-256 627c7b0a2294f728…

MALICIOUS

PDF

50.6 KB Created: 2020-08-25 07:18:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4339c4e4bfe923b1e7eb747a3b80d90e SHA-1: 0b3019a508e98a47a02c10ce4fb958d0c371989d SHA-256: 627c7b0a2294f728a961bcdddf89c0a48199f6d9e1ebc4b89e91238370c7e241
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text related to "invention and innovation" and references the redirector URL, suggesting a phishing or scam attempt. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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=invention+and+innovation+pdf
    • http://files.rehbocksolutions.com/uploads/1/3/1/4/131408204/bomoxinuni_masamuvubexeg_dexoxomunivezo_megox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/wovinirepudekebuduxevapog.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0223/files/93637619799.pdf
    • https://cdn.shopify.com/s/files/1/0433/4675/5734/files/20426495396.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/gazejowevuxupal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/bogapajazimato.pdf
    • https://cdn.shopify.com/s/files/1/0451/3719/9257/files/estructura_del_sistema_nervioso_central.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/pidixutoniwimosoxobozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/rational_functions_examples_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8973/1479/files/99431584280.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_off00007d55.bin
aeb3ca02e7d199a7323388fc1ea4712b02c490fd23dc8b84ed02f551b9ab217a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 4512 bytes
font_01_sfnt_off00008cbf.bin
04c4368c7dcda0b47a1f446335a6c9bc26b54a5c718dbccc2593d8e76a240f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 10272 bytes
font_02_sfnt_off0000afd8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD8 4324 bytes