Malicious PDF — malware analysis report

Static analysis result for SHA-256 af6aa02e8c896b65…

MALICIOUS

PDF

42.2 KB Created: 2020-08-16 13:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f974e028da115758a596fb743ddc8ab2 SHA-1: f5f002d4d079a99425c619f32281416671b15b02 SHA-256: af6aa02e8c896b651669e4442eee90d3ac164bb489af4363a7a6f9fc41bd028e
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.ru/wb?keyword=teaching%20pronunciation%20lesson%20plan%20pdf'. Another critical heuristic identified a PDF link farm with 30 external links, many hosted on shopify.com. The ML classifier also strongly indicated maliciousness. The document body is heavily corrupted, but the presence of numerous links suggests a campaign to drive traffic to malicious sites, likely for phishing or malware distribution.

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.ru/wb?keyword=teaching%20pronunciation%20lesson%20plan%20pdf In PDF document text
    • http://girapo.swiftcreekguitars.com/uploads/1/3/1/6/131637056/8ea9944071.pdfIn PDF document text
    • http://files.artsequality.org/uploads/1/3/1/4/131482997/fenesibi-jozonelinona-wamuruwuwodubex.pdfIn PDF document text
    • http://files.gabriellaquiroz.com/uploads/1/3/0/8/130873741/povezisijeji-donikomo-xukebofekubaw-tilap.pdfIn PDF document text
    • http://files.amymoenart.com/uploads/1/3/2/7/132740619/7162139.pdfIn PDF document text
    • http://files.saynoto66d.info/uploads/1/3/0/9/130969427/buxoliwoxuzi-satetalumena-viraz.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/1/0437/5393/0901/files/17801005902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/bitsat_last_year_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0862/1719/files/dadegusemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/21761028564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/32429244310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6277/9295/files/69688576073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3866/3079/files/autoestima_alta_y_baja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/fetiwuxesetisaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/corriges_cahier_alter_ego_2_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3286/6979/files/rikuwabe.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6632 5368 bytes
SHA-256: ff2222a042bc59f956824d9e412d3a5a5f053fc33fe0652eb815ed8cecff3a65
font_01_sfnt_off00007865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7865 10296 bytes
SHA-256: c8468ab079df37d6963745df29b8d5cb644868dd44f0bb7d803fe9a25be9c9cd

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