Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e3344bdb8e3bd7…

MALICIOUS

PDF

42.0 KB Created: 2020-08-12 18:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1220df190cb27d34ee727d33c62fe760 SHA-1: f63dac60e55f10c2afaa8ed98aa91c890d6e37f9 SHA-256: b2e3344bdb8e3bd779f989ce2b325e6dccc05b93a33ec0fd7df8fdf8e2da2d71
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'anti collision system for trains project pdf' and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to the ttraff.com domain.

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=anti+collision+system+for+trains+project+pdf
    • http://files.lilscholarspreschool.com/uploads/1/3/1/4/131453278/xakaver-vurim-rukidizuwelama-butopuke.pdf
    • http://files.azprint115.com/uploads/1/3/2/7/132740723/tuxusasuluwagek_kuxiwatad_jegowuterijifid_ratidaravez.pdf
    • http://files.jilicm.net/uploads/1/3/1/4/131438316/torivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/basic_anatomy_and_physiology_of_respiratory_system.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/media_query_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7542/files/airliner_world_december_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/good_practice_guide_cold_chain_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/73780582993.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/rupegoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/poxuzot.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/xodepabizugud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5398/9534/files/12606104937.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/14097386091.pdf
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/8th_grade_vocabulary_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/61521813323.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/keras_confusion_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/64524198655.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_off00006668.bin
87ba06ab40486a510f7a77f3d3bdacb13831f76713726ed5c0a463b01e93454e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 5468 bytes
font_01_sfnt_off000078e7.bin
ae8271e5bfbec2a46097edaadc7a84572036f7ddb34e025e9aa75e0648205c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78E7 9860 bytes

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