Malicious PDF — malware analysis report

Static analysis result for SHA-256 036fa41a12b85689…

MALICIOUS

PDF

44.0 KB Created: 2020-08-15 03:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec293159aafd05b527f1bceadc8275fb SHA-1: fac777adedcf2f913a88c13809eff5332f789faa SHA-256: 036fa41a12b85689a929bb9b5a39f377bec5ffc6943420b15814b313f4402950
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains a URL pointing to a potentially malicious redirector. This suggests the primary goal is to redirect the user to malicious sites, likely for phishing or malware delivery.

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=bvb+college+bidar+full+form
    • http://sirigofap.411mediatalk.com/uploads/1/3/1/4/131455734/d8c3b4584.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/business_environment_book_for_ugc_net.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/xetumuporipidozerof.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/12812492307.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/79125133114.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/sovidukinenibagegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/articles_of_faith_lds.pdf
    • https://cdn.shopify.com/s/files/1/0437/6379/4069/files/historia_del_cristianismo_en_espaa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/21327874939.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/breath_of_fire_3_psp_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lavatorumagenikezelun.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_off000060c0.bin
68413f8dab0e8306bb67159f98fb220163cb5b84cdc4f0dd71056bc0cb7a4a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 5108 bytes
font_01_sfnt_off0000721c.bin
adc235e0c6481e6136530e1371608b312251991e9fb9a160b4d301e09cb3f36d
pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 10428 bytes
font_02_sfnt_off00009593.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9593 4324 bytes