Malicious PDF — malware analysis report

Static analysis result for SHA-256 b688f0c0e7bdd498…

MALICIOUS

PDF

73.2 KB Created: 2020-08-06 12:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13d077c701d3a28e727bd623fe39718d SHA-1: 46771359a11343415df346ac418042ffdb97cac9 SHA-256: b688f0c0e7bdd498f1196869a92537f990ef403d8f9a6b82db81350eb51b12f4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'international dependency theory pdf' and a URL that matches the malicious redirector. This suggests a social engineering attack aiming to direct users to 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=international+dependency+theory+pdf
    • http://files.heatitupandkeepitcool.org/uploads/1/3/1/4/131483337/gutomagaka.pdf
    • http://files.mynewonline.store/uploads/1/3/0/8/130874322/tetavutizepefu-disogasufuz-bamafos.pdf
    • http://files.thegreenmanandthegoddess.com/uploads/1/3/0/8/130814926/6534419.pdf
    • https://cdn.shopify.com/s/files/1/0448/0404/6997/files/can_t_help_falling_in_love_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8423/files/68706220791.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/tinkers_construct_diamond.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/16980403524.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/warhammer_40k_deathwatch_codex_vk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/83498083796.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/lujudusimunisak.pdf
    • https://cdn.shopify.com/s/files/1/0447/3644/6613/files/random_number_generator_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/ginitexiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/case_study_method_in_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/pujonowabinediji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/sewit.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/vunaliritavusexepitevefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5328/4519/files/hp_laserjet_pro_mfp_m127fn_manual.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_off0000e1ff.bin
eccf2ea18a18c118fc4b621ccb535b42ecb326fa38f25d4562af0f4d3ffd9e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 5104 bytes
font_01_sfnt_off0000f360.bin
4f7e88d6bd95be2b251566a1bf5b2e8c6922cdc105c8f412df96a61cefae60e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 10564 bytes

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