Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6cbc6186a160a60…

MALICIOUS

PDF

37.4 KB Created: 2020-08-09 10:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9642949a5e8a994ae3a8e2633b2886fe SHA-1: 7cd0e4711d4082f9a3faeab59412ab46dc447767 SHA-256: d6cbc6186a160a6069b96cd5b32b22310c4e0b98aabd361f15771ca62a8450f9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=atrrs+course+catalog+pdf`. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or content-loading mechanism designed to obscure the malicious redirector. No scripts were extracted, limiting the analysis of further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=atrrs+course+catalog+pdf In PDF document text
    • http://files.eswirdeinmal.com/uploads/1/3/0/7/130774990/tusukonigi_tozijufem_luroveguz.pdfIn PDF document text
    • http://files.ktjo4x4.com/uploads/1/3/1/3/131383837/59fb35810067b.pdfIn PDF document text
    • http://files.laromas2go.ca/uploads/1/3/1/4/131453177/bixurusagafew_tizas_wevuwawajutuwa_rasotopaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/useful_chinese_characters_for_learners_of_korean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/management_13th_edition_robbins_and_coulter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3361/6803/files/93909682913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2439/7989/files/55272886113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/loxix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3485/3021/files/sogunidewiloped.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/96719800924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0463/2992/files/956263800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/41131372832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/visual_c_redistributable_2005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9855/5043/files/2410824129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/14993741702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1047/3633/files/1950141811.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
🗂 Part of campaign: laromas2go.ca 4 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5497 5312 bytes
SHA-256: b3957e213501bddb56b111add1ba84070d5bd7e6038006c5bf4e3414f1781b46
font_01_sfnt_off000066bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66BC 9988 bytes
SHA-256: 186708298ccb50c736b852ad996e0c50e512b8601a58924aad48637b203dffd8