Malicious PDF — malware analysis report

Static analysis result for SHA-256 3754ec162bd48d9d…

MALICIOUS

PDF

36.6 KB Created: 2020-08-18 18:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd49e6b3bc2b0bd130b6068b93ec2921 SHA-1: 14b7db608040f86618db3454adc2843da5c21cf8 SHA-256: 3754ec162bd48d9d4b236f0c3b122f20c8eb3719b7896ef006655b1c0b960574
152 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.com, which is disguised with a keyword related to popular media. The document body also contains this URL and references to movie songs, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=south+movie+video+songs
    • http://files.nealblack.net/uploads/1/3/2/7/132712315/6202919.pdf
    • http://gifite.adairgunsmithingllc.com/uploads/1/3/0/9/130969858/jixuzekuwixusofob.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/mofakosojuwenelozewur.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/labixazerevifu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/62799483887.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/human_anatomy_5th_edition_mckinley.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/golalebilafofuzugetuvi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/52805940245.pdf
    • https://cdn.shopify.com/s/files/1/0441/0294/2872/files/fundamentals_of_chinese_characters.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/navogomuzabonafol.pdf
    • https://cdn.shopify.com/s/files/1/0432/3518/0703/files/67939880277.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/algorithm_design_manual_skiena.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4682/files/lixefefebibisaranawej.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/1077534511.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044f0.bin
c6f4329286335fafe3f17659fa329de4f948587d80eaab51fd03216be166b4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44F0 5064 bytes
font_01_sfnt_off00005611.bin
865b91ff1aec3604525de2452668925a8f61712ef6efa54c8ce87154ad500c17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5611 10024 bytes
font_02_sfnt_off000078af.bin
cb991c6772974b3c6e8c5eb2a8fde888741d52d963403f6267d0ec00c535cebc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 3256 bytes

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