Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4d1fe897e577e0…

MALICIOUS

PDF

33.4 KB Created: 2020-09-18 00:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02b31c4749c4041bbfea764d95144bda SHA-1: c390780b85acbdfab68743853c916f6846ea7261 SHA-256: ad4d1fe897e577e08f2fd68059c5eb6e773edf0b6dbeed90ba9dd275e881b498
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/wix?keyword=cell+respiration+concept+map+answers, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious content with a seemingly educational topic. The presence of numerous external PDF links further supports the classification as a link farm designed to distribute malicious content.

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/wix?keyword=cell+respiration+concept+map+answers In PDF document text
    • http://files.teddies-afrique.com/uploads/1/3/0/7/130775398/lotofimaw.pdfIn PDF document text
    • http://xuxina.columbiawildcatbands.com/uploads/1/3/1/3/131379362/wugupa.pdfIn PDF document text
    • http://kazanuk.ramiroberardo.net/uploads/1/3/1/3/131382271/luxalarabevimamok.pdfIn PDF document text
    • http://files.sathiavanee-veeramoothoo.com/uploads/1/3/1/8/131871891/jidutemepupaz.pdfIn PDF document text
    • http://gegevom.astleychurch.org/uploads/1/3/1/4/131437181/5301075.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://176617b5-3648-4ded-874e-7d125e791c87.filesusr.com/ugd/defdb4_a77c7e687bd048e39a4bc4c6411fa9eb.pdf?index=trueIn PDF document text
    • https://fd6fb098-a6e3-4052-ba04-b6cac29ffece.filesusr.com/ugd/90c678_c90512c386f9437a97cadc1bc20a5371.pdf?index=trueIn PDF document text
    • https://8e05c4e1-5560-4b80-9bae-9d9bef75d0e9.filesusr.com/ugd/a2ebd8_c8e76a4848864e08a42e80db574aa41e.pdf?index=trueIn PDF document text
    • https://686f6e0f-21fb-4543-b758-1153cdeb1e1f.filesusr.com/ugd/ee6100_672f26ed6d384e6dbb43d6c96280b0b5.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/jodupemudakapevisobuxewi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0317/7883/files/pulomoremapifavis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/84440490788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/occupational_therapy_cpt_codes_2019_cheat_sheet.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_off000045e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45E7 5076 bytes
SHA-256: 1ac818224df7adae662c21388945789fe325a2ceb360d3bafcd6b03597ceb1d2
font_01_sfnt_off0000571d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x571D 9808 bytes
SHA-256: 4a53c12232e5f56ea4ec887f17d002560decd567640c22748b9da6b4412b286a

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