Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b1a446287e59ac…

MALICIOUS

PDF

45.5 KB Created: 2020-08-23 02:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce38ff65ab08b648f348c8d0048f13c SHA-1: d4b1d129067e6a89be6d8b9f44b6490cb418b2da SHA-256: 02b1a446287e59acb3aa78b9b736af66b72acd00aad803dba2d75ac22c9f7cf9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at `ttraff.com`. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=cycling+training+program+pdf
    • http://files.fuelsmarketing.com/uploads/1/3/0/8/130874254/7569430.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/vagerokipani.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/vilelodedim.pdf
    • https://cdn.shopify.com/s/files/1/0435/2193/3466/files/gapekovedubu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/d3_drop_down_menu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/bubble_sort_java.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/alimentacion_consciente_recetas.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/persona_3_fes_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0451/3703/5429/files/adeptus_titanicus_rules_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7388/6613/files/pivazefetiva.pdf
    • https://cdn.shopify.com/s/files/1/0449/7804/5096/files/passive_voice_present_past_simple_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/pevararokuba.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/senipelovojobif.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_off00007401.bin
a1bde0759bbaa397b47a455ed7eb3ae6f9d10ffbb67e481bfea916dd4f40922c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7401 5304 bytes
font_01_sfnt_off000085f1.bin
d9ba39c09ec37e096b112c9ea8b277ada3ab612ae995632fc80a21d77a75aeb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x85F1 10416 bytes