Malicious PDF — malware analysis report

Static analysis result for SHA-256 a089fec83d741630…

MALICIOUS

PDF

37.6 KB Created: 2020-08-28 01:57:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5d70ceb4966f16732ca250370f5f16a SHA-1: 247f7255a516ed95e54be0deaf0d84dd43edf317 SHA-256: a089fec83d741630506fede6ae7afe1f79258034231fe969c12b11b3ed87b042
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a critical link to a known malicious redirector at https://ttraff.cc/pify?keyword=verb+to+be+present+and+past+exercises+pdf. The document body, though heavily obfuscated, appears to be a lure for an exercise PDF, aiming to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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=verb+to+be+present+and+past+exercises+pdf In PDF document text
    • http://daxig.jessicaeastburn.com/uploads/1/3/0/7/130776225/peginutik.pdfIn PDF document text
    • http://files.modified-mama.com/uploads/1/3/0/9/130969754/81f540c782e.pdfIn PDF document text
    • http://files.merrycox.com/uploads/1/3/1/4/131438069/6932355.pdfIn PDF document text
    • http://files.denttechsolutions.com/uploads/1/3/1/6/131606343/f3095160e22.pdfIn PDF document text
    • http://files.tedxkitchenered.com/uploads/1/3/1/4/131406518/mufedoxowa.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/1/0433/0638/5573/files/41508850260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/padi_open_water_final_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0482/9602/files/83632925519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/75639100255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/tofilupigirurikevizaxanim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/61523929969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/98197688100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9511/3125/files/56549058559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6762/2055/files/39592984848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4111/9647/files/anomaly_defenders_apk_data.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/44692720131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5363/8044/files/kimobixuvudi.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 5

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_off00005532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5532 5288 bytes
SHA-256: 226251085c4872f7dc58b2cf6e64ec81ccf35ee47f3cbd5dae842b41ea473bd7
font_01_sfnt_off00006739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 10024 bytes
SHA-256: e4cae41d0bec5d5b63b32b13b4a4daf37d1f332acbe285cb6ff6fdc353a5959e

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