Malicious PDF — malware analysis report

Static analysis result for SHA-256 b29aa6385b8a0d24…

MALICIOUS

PDF

37.3 KB Created: 2020-08-11 01:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996899bb45fd98a6689cd6d8e26d0f83 SHA-1: f492485b553ddd6fe4b5c07c3d7221f39e47de80 SHA-256: b29aa6385b8a0d24fd612b202fbd2b1d407fc15b62a0ca4947ae564b685c930b
150 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 identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=story+of+an+hour+questions+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of a large number of external PDF links further supports a link-farming or redirection-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=story+of+an+hour+questions+pdf
    • http://files.tracygrayart.com/uploads/1/3/2/6/132695360/jaselupari_bufuvim_fuvor.pdf
    • http://gepuru.waitlessplay.com/uploads/1/3/0/7/130738720/majeveselu.pdf
    • http://files.lexihut.com.au/uploads/1/3/0/7/130739165/9857939.pdf
    • https://cdn.shopify.com/s/files/1/0433/3341/9160/files/xolavurupibegegemesononim.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/jewuwijiparugebuw.pdf
    • https://cdn.shopify.com/s/files/1/0445/9751/0308/files/ssc_stenographer_english_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/71971885553.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/xanij.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/14184617894.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/arquitectura_maya_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/claws_of_shirvallah.pdf
    • https://cdn.shopify.com/s/files/1/0436/1184/8861/files/hernia_inguinalis_lateralis.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_off000054bb.bin
e0a98170e69cca8a2b74380ec5803756f4bd1f8f438fc5049576c6c15221fc8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54BB 5428 bytes
font_01_sfnt_off00006720.bin
d02b89f38198230ded59532e012c344cf941f38b3e8fc8180a2f40a80f48f520		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 9784 bytes

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