Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1802f2e10887a3…

MALICIOUS

PDF

38.1 KB Created: 2020-08-22 02:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 731194ea7376236c2e373b4b799fb803 SHA-1: 5858382f99bb39fd9d8f13134062f0e9631aebd2 SHA-256: 5d1802f2e10887a37171813739947f883b0e9537dfaae6148088f0f260394254
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=sheet+street+greenacres+trading+hours, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to potentially harmful content. The presence of numerous links, including benign ones from Shopify, indicates a link farm strategy, likely for SEO manipulation or to obscure malicious destinations.

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=sheet+street+greenacres+trading+hours
    • http://nurula.oui3.com/uploads/1/3/2/3/132302978/bemepof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/father_berchmans_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1512/files/rexelamefixed.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/mufogedalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/on_arrival_visa_thailand.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/61814317995.pdf
    • https://cdn.shopify.com/s/files/1/0463/1878/0578/files/allahabad_university_admission_form_2018-_19.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/neela_bakore_biology_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6187/7665/files/3951519715.pdf
    • https://cdn.shopify.com/s/files/1/0452/1564/5856/files/jakupuji.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_off0000499b.bin
4cb453851dc93d7aaf13005533d1938803d56cec21622c063671cb54d76bac13
pdf-font-stream PDF embedded font (sfnt) at offset 0x499B 5156 bytes
font_01_sfnt_off00005b08.bin
68315b1b76237939f015706bb02bdb4d522328fe04eed43440095eaf44f4e737
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B08 10180 bytes
font_02_sfnt_off00007dc7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC7 4324 bytes