Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d5dcec76e41c46…

MALICIOUS

PDF

33.5 KB Created: 2020-08-04 11:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1df71333689e3877288a03e5ba5e115 SHA-1: af6b9710c2972c9e23f0986c5cbe046b9b23ad93 SHA-256: 54d5dcec76e41c46093fd81212403ea05c317ee6c2bc06e217b59599c513888b
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to `https://ttraff.ru/pify?keyword=el+aprendiz+de+brujo+grimorio+pdf+gratis`. This URL is likely used to redirect users to malicious content. The document also contains a large number of embedded links, many of which point to benign Shopify domains, but the presence of the malicious redirector suggests a link farm for SEO poisoning or phishing.

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=el+aprendiz+de+brujo+grimorio+pdf+gratis
    • http://files.marriagecelebranthilaryvaneldik.com/uploads/1/3/1/4/131483955/bolizorofo-nixawuwol.pdf
    • http://files.dorxiesbrowsandlashes.com/uploads/1/3/1/0/131071137/7801842.pdf
    • http://files.hceaproud.com/uploads/1/3/1/4/131453065/178080.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6405/files/c_getline_delimiter.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/14228443714.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/wolofamesivuxeta.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6519/files/mabekula.pdf
    • https://cdn.shopify.com/s/files/1/0436/8223/4521/files/40281063988.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/10533252429.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3331/files/49477895397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1204107997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wawufomujemozinabewa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4470/9276/files/nuzixupozasifulowixalu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8601/8712/files/boyce_differential_equations_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/lonavixojulopitumumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/88438581930.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/70500627622.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_off00004559.bin
33858ab2118c713780843ccce6d1ae13f61d92356e1437fbcf127cdaa99c1400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4559 5584 bytes
font_01_sfnt_off0000584e.bin
625ccc9ecca372abd14cc91c06cdc4bdb967e231d5b9b26b9d56f10ecc72d5eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584E 9420 bytes

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