Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec740815bdbd603…

MALICIOUS

PDF

49.0 KB Created: 2020-08-03 17:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff82c0e050d054e0baac9acbb0a05fd8 SHA-1: 0de57ceb91da353b67e2924df1285961abfa8b30 SHA-256: aec740815bdbd6034aea52c3c7c1fdf437fa226f441ef59408342c955e94f710
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign documents. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aisi+4140+h+pdf.

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/pify?keyword=aisi+4140+h+pdf In PDF document text
    • http://files.lynnwinchester.com/uploads/1/3/0/7/130740571/fubidejelolejor.pdfIn PDF document text
    • http://files.k-sportsmassage.com/uploads/1/3/2/8/132814989/5729859.pdfIn PDF document text
    • http://files.hdtrbch.org/uploads/1/3/1/4/131455463/wirojexi_gafar_bawokofujilamiw.pdfIn PDF document text
    • http://files.myonlinehomeopath.com/uploads/1/3/0/7/130776327/5241602.pdfIn PDF document text
    • http://files.workingmolossersunited.com/uploads/1/3/0/7/130739603/tuwiwefazuwatiboweb.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/1/0432/0965/4436/files/eminem_marshall_mathers_lp_2_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/tbc_blacksmithing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/gamubixonegozonuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/nate_practice_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/soxupazovus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/town_of_salem_wiki_investigator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/65940042501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/weduboselox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/42617591677.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 8

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_off00007390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 5064 bytes
SHA-256: c1f24d565476e8c4ab0d2f59ab529c490ab1dd39a96cac098afabc1af8e1d770
font_01_sfnt_off000084df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 16144 bytes
SHA-256: 008342d527f7ac0da37e186d962adf421a3eeb87556e112df93de9a444fbd2d9

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