Malicious PDF — malware analysis report

Static analysis result for SHA-256 edfe5084a23aa59f…

MALICIOUS

PDF

52.0 KB Created: 2020-08-07 22:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3c04f38e3b67bb2870a3d672966a5b5 SHA-1: 9c660d29bf196d02b0fd8d54940b927a09643f43 SHA-256: edfe5084a23aa59f59058cbf25ebf4526e67e32d16ad32fde062bb752b6582f2
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link within the document body, aiming to redirect the user 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=biochemical+test+for+pseudomonas+pdf
    • http://files.swinganoia.com/uploads/1/3/1/8/131856769/punevupo.pdf
    • http://zaritisug.ingerlene.net/uploads/1/3/0/7/130776031/kovazexate-rivif-pudapuveriki-rawujiraguxel.pdf
    • http://files.pablovargaslugo.net/uploads/1/3/1/3/131378915/1619697.pdf
    • http://files.herbalbeautysoap.com/uploads/1/3/0/7/130775518/juwudofabugeti.pdf
    • https://cdn.shopify.com/s/files/1/0436/1404/4323/files/how_to_multiply_2x2_matrices.pdf
    • https://cdn.shopify.com/s/files/1/0431/7596/8928/files/zarowomojimefuzet.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/1391215504.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/96442563078.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/grade_10_math_module_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/derilezexidu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1864/files/20313864041.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/83934022752.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9442/files/tazoxowenizamodawevumafus.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_off00007370.bin
12834531232a07693f51d74d3de299be39a792c29d4c4f28d900911bcdcc3ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7370 5324 bytes
font_01_sfnt_off00008557.bin
b8e850b2e564e93e3553a5f7757a1dadb7b291cfb00ecebd2718087b96d5d46f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 14788 bytes
font_02_sfnt_off0000b30a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xB30A 4324 bytes