Malicious PDF — malware analysis report

Static analysis result for SHA-256 887c63b7b03f34a3…

MALICIOUS

PDF

64.5 KB Created: 2020-08-30 11:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b7a8d1baa4ca143032a4045fb553ea SHA-1: 88a5408070ee7ccd43901cc32c8896f8dca144fa SHA-256: 887c63b7b03f34a3600371bce024dbf359731bedc620b8c2b4b453733a9ea145
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.cc`. This URL is embedded within the document body, disguised by text related to food preservation. The document also contains a large number of external PDF links, many hosted on `cdn.shopify.com`, suggesting a link farm or SEO poisoning tactic to distribute the 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.cc/wix?keyword=tipos+de+conserva%25C3%25A7%25C3%25A3o+de+alimentos+pasteuriza%25C3%25A7%25C3%25A3o
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/dyson_dc25_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/luxizapife.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/nedibamabawode.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/28846286759.pdf
    • https://cdn.shopify.com/s/files/1/0436/8013/7369/files/kadarepupomeso.pdf
    • https://cdn.shopify.com/s/files/1/0448/2806/5949/files/basic_concepts_of_chemistry_class_11_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/4832790778.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/medievil_ps1_rom.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/3d_geometry_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/ratilugutowasogarebujoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/mugufofaguposavokukiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9125/files/64426444989.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30036161276.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_off0000b7d9.bin
6cc84a198630370641e713b824232887599bf43d907e897b9803820d8b24712f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D9 5780 bytes
font_01_sfnt_off0000ca8c.bin
593932334be7335fed801c6d418d003529597f8cf948c4dc34168c088de0c81b
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8C 13720 bytes