Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22f6e671b6e8f68…

MALICIOUS

PDF

38.6 KB Created: 2020-08-05 16:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d5fd1287396baf02aff12f4ad33417 SHA-1: 59abe99156b828fb3aed78cecd3c9a2044b467bc SHA-256: d22f6e671b6e8f689cb546fa9c491384eb71bde26311b12548b50b5f5da3d29b
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify and appear to be SEO-optimized lures for documents. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the same lure text as the malicious redirector URL, suggesting a coordinated phishing attempt.

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.cc/pify?keyword=introduction+to+statistical+quality+control+7th+edition+solutions+pdf
    • http://files.marriagecounselingmontclair.com/uploads/1/3/0/9/130969452/623802.pdf
    • http://files.crystalcoastbooks.com/uploads/1/3/0/7/130775182/nelapuvaruxoje-bugako.pdf
    • http://files.middletownbaptistchurchmo.com/uploads/1/3/0/7/130739312/4122267.pdf
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.pdf
    • http://files.oconnorsmusic.net/uploads/1/3/0/7/130775665/590ddd.pdf
    • https://cdn.shopify.com/s/files/1/0430/5492/3925/files/guide_to_sql_pratt.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/88820553678.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/general_allotment_act_of_1887.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7633/files/piputerojis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/subebawijebo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5805/files/ballade_no_3_chopin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jobevemavesofidubuxiwi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4094/5829/files/nugunoxaluzujiwikozer.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/texas_county_fips_codes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/laxefasigapabaxirasu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/sekag.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/the_bunker_1981.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_off00005799.bin
e71b8040034749aed88c0fb607a7a06d8eb287634f218cb21b1e6d791e23d96d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5799 5488 bytes
font_01_sfnt_off00006a48.bin
03be1cb6df5c47d745f762431d6286edd08e307b09a246a42cf2d33f6f2c339f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 10092 bytes

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