Malicious PDF — malware analysis report

Static analysis result for SHA-256 85afc4780c634462…

MALICIOUS

PDF

53.7 KB Created: 2020-08-04 09:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a165b2c2bbdd7ff982fca3574d4ed904 SHA-1: aa768568c13806f294851914ef392179c9c52125 SHA-256: 85afc4780c634462988e49785977ce068b37e3cbd3afcd3a0e3eb26251ddc094
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to other PDF documents. One of the primary links, https://ttraff.cc/pify?keyword=fundamental+articles+of+islamic+faith+pdf, is identified as a malicious redirector. The file's structure and the presence of numerous external links suggest it is designed to distribute or link to other malicious or spam content, potentially as part of a link farm or SEO manipulation scheme. No scripts were extracted, but the embedded links are the primary vector for malicious activity.

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/pify?keyword=fundamental+articles+of+islamic+faith+pdf
    • http://files.lemonthistory.org/uploads/1/3/0/9/130969990/bumafu_gadurikuv.pdf
    • http://lagoxeju.apostrophe1.com.au/uploads/1/3/1/4/131438216/62aa9f.pdf
    • http://files.laviproject.org/uploads/1/3/2/6/132695392/gulaman-nijolenipup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/how_to_convert_google_sheets_to.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/39510823691.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/8868431324.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/65615035150.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/xoripafufokexavid.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/zanoze.pdf
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/ir_values_of_functional_groups.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/sijikawitareliwizarere.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_off000095bd.bin
d72be97f3e381dd95b7e38d70b09a30f81d9c9abc4eaf5698d6c31d48de7726c
pdf-font-stream PDF embedded font (sfnt) at offset 0x95BD 5352 bytes
font_01_sfnt_off0000a7c2.bin
202238a0fb4c04d44bd0a0d0934292920fc27173502fb529d46af35ced13c228
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C2 9896 bytes