Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1b8dccf14262c4…

MALICIOUS

PDF

43.2 KB Created: 2020-08-24 06:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1252df96d42edc29a7c1e2ce08a67358 SHA-1: c5b0efefc6797440effc91db5c2de77ce628f3bc SHA-256: 7e1b8dccf14262c4b9c64b22da66b94bd0db431b677c72943b48c19ce8ac8451
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=data+retention+policy+template+uk+gdpr, which is also present in the heuristics. The PDF also exhibits characteristics of a link farm, with numerous external links pointing to various PDF files, likely for SEO manipulation or to distribute further malicious content.

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=data+retention+policy+template+uk+gdpr
    • http://files.simleysoccer.com/uploads/1/3/1/4/131452942/puvamitem-zirazite-kozegan-gamezam.pdf
    • http://files.perfectdimensionsaz.com/uploads/1/3/2/6/132696104/3284882.pdf
    • http://zufozuno.chrisrookwoodpottery.ca/uploads/1/3/1/4/131438539/winosiladamogi.pdf
    • http://files.jelena77.com/uploads/1/3/1/8/131871912/6930800.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/vavifobijikesodotaforof.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/angels_blood.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1767/files/physical_science_10th_edition_tillery.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3350/files/bafebuboke.pdf
    • https://cdn.shopify.com/s/files/1/0435/4624/7332/files/guwamutusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7637/files/apprendre_l_anglais_professionnel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28391359898.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/resuscitation_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/77539122061.pdf
    • https://cdn.shopify.com/s/files/1/0435/9605/4690/files/kefotujiposalozomezuloker.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/58526538591.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/criticism_of_utilitarianism.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/42795543524.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_off00006b6a.bin
97dec4dcbee39a5ee5ea3cc2944e063ae872deb7ef6513167ae2567b2ff3d42b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6A 5380 bytes
font_01_sfnt_off00007daa.bin
f0847b1d1f39fd2d13c172cf9cc1eeeb6b38e39fb92ec041a773efb22765aa29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAA 9916 bytes

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