Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2a7e94d0e1e93e…

MALICIOUS

PDF

40.8 KB Created: 2020-08-11 18:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e1b8e0e75271105bff0068c95b165ec SHA-1: 6b04dd65c9e5c8222ffb22d2afec61981bd047a0 SHA-256: 6e2a7e94d0e1e93e8fbf2f34fea6c7aa392c4811b461a39dd3e8ac3bb2f8bba2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One prominent link, 'https://ttraff.ru/pify?keyword=business+process+mapping+book+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, indicating an attempt to drive traffic to potentially malicious sites under the guise of providing a book.

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=business+process+mapping+book+pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • http://zebasat.paradisecoastreport.com/uploads/1/3/0/8/130815017/2207271.pdf
    • http://files.bhawanimaa.org/uploads/1/3/0/7/130739648/632af4fa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/jixafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/air_cooler_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/timamokimadakazaki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7969/5526/files/holt_life_science_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/poxewozabunitozo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7328/8869/files/pumivabinasadodugowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8441/5143/files/fikobevitoligana.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/mabilonenenirevomajosoxin.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6556/files/japomonalepedemop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54344474436.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_off00006002.bin
ffbf7b74a6650ea04952e7a5571cf95dd963b12b96a450b85a29d678f29f5805
pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5696 bytes
font_01_sfnt_off00007344.bin
43f72f6f2f95e3746206c6c6e20f8e75478a4ddeed955111607f1838e9f2d1b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7344 10308 bytes