Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36e6c92fb865407…

MALICIOUS

PDF

41.7 KB Created: 2020-08-07 23:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbe228c9e7ff93d448e2d5c3a7548b3e SHA-1: 207d45c8f1e21df03a70884cfb99bbae6e4f4de0 SHA-256: e36e6c92fb86540781bf7d07597d62ecc04f45a6a8d70124313e00c0265271b5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body also contains the same URL, suggesting it is the primary lure. The presence of numerous external PDF links, many benign but some potentially malicious or part of a link farm, indicates a likely SEO manipulation or content-piracy scheme designed to drive traffic or distribute 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.cc/pify?keyword=makkar+ielts+academic+writing+task+1+pdf+download+2020
    • http://lemefino.davewarneke.com/uploads/1/3/1/4/131452977/jabotiw_wixelizufur_pabenave_nozomelegoxina.pdf
    • http://files.leadfromhere.com/uploads/1/3/1/4/131438190/9979084.pdf
    • http://files.smileyartgoods.com/uploads/1/3/0/9/130969960/27d0f7b.pdf
    • http://files.smokedearthceramics.com/uploads/1/3/0/7/130739776/fijipebanimatanig.pdf
    • http://files.jenateer.org/uploads/1/3/0/8/130814205/1c7b7.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/adjectives_order_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/vovaz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/59000048767.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/social_media_addiction.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8672/files/now_you_see_me_2_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8100/files/lidolodid.pdf
    • https://cdn.shopify.com/s/files/1/0435/5375/1189/files/239370106.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3970/files/rusezifugalixezuxufarok.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/potex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/barreras_de_la_comunicacion_en_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/72645696107.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/doxibegaperi.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/
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ac.bin
67229734e55e9e50c815550113205ceef833a0144fb043e52cc1941804ef360e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AC 5960 bytes
font_01_sfnt_off00007713.bin
7140820923f7e66682b9f309733c0d2ba3f7a56e248206cb447f6e90660f019d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7713 10036 bytes

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