Malicious PDF — malware analysis report

Static analysis result for SHA-256 616456d1a31ab739…

MALICIOUS

PDF

55.3 KB Created: 2020-08-08 13:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0a806c01cf4a7afd6f5f944b027a314d SHA-1: fa9a9ecd954a3431275dadc153fe11a20dcd040b SHA-256: 616456d1a31ab7398325d3312771e6539b5b8ecef03c7793ff7a1a3b59ce1a8a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass link farm and a specific redirector URL, indicating an attempt to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The primary redirector URL is https://ttraff.ru/pify?keyword=ielts+simon+speaking+part+1+pdf, which is associated with known malicious redirector infrastructure.

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=ielts+simon+speaking+part+1+pdf In PDF document text
    • http://files.justksd.com/uploads/1/3/0/7/130775195/jarojipa-kuwogak.pdfIn PDF document text
    • http://files.5thstreetfinancial.net/uploads/1/3/2/6/132695372/fezalowi_fajukururufo_ratajo_dakagelotifinur.pdfIn PDF document text
    • http://files.kerenvishny.com/uploads/1/3/1/3/131398308/kanipiduruniru_bezexof.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/1/0431/7783/6703/files/brian_head_utah_weather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7544/files/liradorufulidamavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/gegazomuxubidobizaxuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/felelafusojogemixuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/5286080841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0999/0043/files/582809153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4396/1494/files/tavevisirupisalej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1482/2808/files/prot_paladin_icy_veins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9546/5892/files/kogojerisizomadenola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5502/1223/files/newofewonukex.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_off00009c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5C 5412 bytes
SHA-256: 5309662af357dc6adb8d5ef714868d5e2d1daec18468ed2db2436d4d26f3b318
font_01_sfnt_off0000aeb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB4 10028 bytes
SHA-256: 0baf07ad3cc79d805fd0b3f726164e9bc0cade98268da2c01ef230eae6944a7d

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