Malicious PDF — malware analysis report

Static analysis result for SHA-256 944a022bdaf79870…

MALICIOUS

PDF

49.1 KB Created: 2020-08-13 00:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0809d406f6b42865c525db280d87069c SHA-1: f930eedda0be99123d0ee8385e7824eb037c2c72 SHA-256: 944a022bdaf79870390040c415ec8a122ada39ba9c9556d2414ad609eddff33e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `ttraff.com`. The document body, though heavily obfuscated, contains text related to 'Reading ielts academic practice test pdf' and the malicious URL itself. This suggests a social engineering lure to trick users into visiting a malicious site. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely for SEO manipulation.

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=reading+ielts+academic+practice+test+pdf
    • http://files.sustainabilitysciencelab.org/uploads/1/3/1/3/131381799/tuwuzajibilu_manewuwumefuv_buxuligurup.pdf
    • http://files.derekloginoffshoretrust.com/uploads/1/3/1/4/131454549/budupu.pdf
    • http://rajawolod.phoenixlabconsulting.com/uploads/1/3/0/7/130740178/jinanedejizazum-wokedaxagobo-xosiwil-nazal.pdf
    • http://files.marianjohnsonhealyvoicestudio.com/uploads/1/3/1/3/131382395/resux-gifitazolire-vejufane.pdf
    • http://files.saintlouisspeed.com/uploads/1/3/0/7/130739183/botudemalobofibisewu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/1352546636.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/passport_renewal_form_uk.pdf
    • https://cdn.shopify.com/s/files/1/0438/1740/2530/files/74419869573.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/talozomo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5055/7855/files/96409720079.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/filmfare_awards_2020.pdf
    • https://cdn.shopify.com/s/files/1/0441/0625/2440/files/tukis.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/36251772523.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/jexatogituputij.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_off0000748b.bin
c82aae045421701954d1f0726eab39983752602f93ebffd146d8ffa8ff5c8ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748B 5160 bytes
font_01_sfnt_off000085f8.bin
5aafaf8664abad1de5b6d35534079f0400ae57c5fa290ec9aaf078a526050dd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F8 10344 bytes
font_02_sfnt_off0000a90b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA90B 4324 bytes

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