Malicious PDF — malware analysis report

Static analysis result for SHA-256 226743afde34bb58…

MALICIOUS

PDF

47.4 KB Created: 2020-08-21 05:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b4db9f54fb1f98113b165962fca6b42 SHA-1: d5290d702df863f039132c1d1c3b2da8396b7934 SHA-256: 226743afde34bb586fb2756c302e469ae25df7b7e7ffe8d8b9d8f15900a6e2cc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as an employment insurance form. This is further supported by the PDF_SEO_LINK_FARM heuristic, indicating a large number of generated links, and the ML_NYX_PDF_MALICIOUS flag. The document body contains the malicious URL and appears to be a lure for users seeking employment benefits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=employment+insurance+sick+benefits+form
    • http://files.biblicaljourneys.net/uploads/1/3/2/3/132303410/foloxujiratak-robokozop-kozapesew-tuvudil.pdf
    • http://files.amyazano.com/uploads/1/3/1/3/131379296/zebakunakowumoxunus.pdf
    • http://files.sheilalangston.com/uploads/1/3/2/8/132816036/6211206.pdf
    • http://fodof.jenniferphamportfolio.com/uploads/1/3/0/8/130874276/e9d1aba49.pdf
    • http://tuduvofis.littlebundleandco.com/uploads/1/3/1/4/131482952/9840310.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/pezipekuzis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/kanchana_aaaa_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/shanwan_ps3_controller_retropie.pdf
    • https://cdn.shopify.com/s/files/1/0433/6340/1877/files/civil_engineering_drawing_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/5153893557.pdf
    • https://cdn.shopify.com/s/files/1/0429/2375/3635/files/giledotizudanigawebaben.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/muxosanaluvalodazuko.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/book_of_romans_bible_study_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/80451916249.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/62549877054.pdf
    • https://cdn.shopify.com/s/files/1/0459/3156/1127/files/mujesodakezan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b61.bin
5625ceafed7a7111450ea10e9ae7f058e8bbb9e461f1629c54e413d2170f48cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B61 5424 bytes
font_01_sfnt_off00008dc7.bin
dcf26ce889839531e13911d708ff0f212ed357f30e024b3146de2b439db37a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC7 10064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.