Malicious PDF — malware analysis report

Static analysis result for SHA-256 898d34084d60b59f…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 16:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f72a8f5559f82686bfda0431dd163a5b SHA-1: 2e9fe8020a7d5e31e0cd56aa19fefcb4f4ca1499 SHA-256: 898d34084d60b59faf811ee5e91ea3cc5b53545df74bb0dd239f33a6b4c3d3f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=bazigar+odia+song+ringtone'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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=bazigar+odia+song+ringtone
    • http://telusiw.qksnd.com/uploads/1/3/1/4/131454012/kiniviza-meziburixenil.pdf
    • http://pemijate.sterlingexpeditions.com/uploads/1/3/0/7/130776031/005cee8.pdf
    • http://files.jancancan.com/uploads/1/3/1/4/131406413/sosazidisajawaj-ledosol-vaxodavuv-ziwobedomanefon.pdf
    • http://godisowox.nhsafelock.com/uploads/1/3/1/3/131383042/24f37bfcc696a.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/kufuzarutatatevudij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5367/0822/files/magruder_s_american_government_answers_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/pakikusobigororeviwelu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/93235291796.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/fisupafugurawefusoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/libro_de_los_mediums_allan_kardec.pdf
    • https://cdn.shopify.com/s/files/1/0434/6383/5814/files/35603271995.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/menoke.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/importance_of_affective_domain.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/57773131342.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/ma_sociology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/ccpc_act.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1474/files/alchemy_emperor_of_the_divine_dao.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_off00005066.bin
5e73ca7734d671a81d433ef6d5f18bba4bdd51f421a1975f5f4de35d9d82ad52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5066 4848 bytes
font_01_sfnt_off000060e9.bin
d860aaff81acade6c3890f4092257ffe5da2942c02907c7704da05f48d6213a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 9876 bytes
font_02_sfnt_off000082ba.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82BA 4324 bytes

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