Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7226e7d6c648cb…

MALICIOUS

PDF

43.4 KB Created: 2020-10-31 16:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 785c25b7ea9b6ff1c86292c72f3fdadc SHA-1: 268f72a227c48b73a75ef3ab8a6327ee93c36217 SHA-256: 0b7226e7d6c648cb3c0ea25bdbcde27da4a655581697d65be692739b23c1cab9
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and contains a large number of external links, functioning as a link farm. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=relationships+between+dna+genes+and+chromosomes', is known to be a malicious redirector, indicating a potential phishing or malware distribution attempt. The document's structure and content suggest it is designed to lure users into clicking malicious links.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=relationships+between+dna+genes+and+chromosomes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f93be72a7c5f.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/7424ba554f275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375705/normal_5f97a66b1a45b.pdfIn PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/2d6285f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403117/normal_5f911cc863478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_5f9c608a4995e.pdfIn PDF document text
    • https://lotijilakoda.weebly.com/uploads/1/3/4/4/134468432/4614655.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bagatazojiz_sidatasofugugor_sofaxazute_gureluf.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/suzigatatajoxuto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5f996f3343c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_5f95254678d02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/349357cb-718c-4521-98c6-2c10189e0033/36773465265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0186cccf-8aa3-40d2-8e3d-b9f879954c13/dark_souls_talisman_best.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8871/8240/files/sap_co_tcodes.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6851 5728 bytes
SHA-256: 8a86993caaccfd20dd9c13a8b93378baad791ff5b392611c96355a6b205099d9
font_01_sfnt_off00007bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB0 10812 bytes
SHA-256: 5832d973e009d208efa98180e089aac9ed4661573a52e18e7b2d35713176dc96

Open this report in the interactive analyzer, or submit your own file for analysis.