Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dd150ae71e5945…

MALICIOUS

PDF

40.4 KB Created: 2020-08-14 08:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c54417d0bb8d4dd2485720feca4768cd SHA-1: 6a0568a5a8b0874a7e77a73c050a97fa53bb8b2d SHA-256: d2dd150ae71e59457e4c429f6bec13144df70b8f0ea11e3271f8819b9a361f4b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, 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, leading to potentially harmful 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.ru/wb?keyword=scientific%20method%20and%20history%20worksheet
    • http://files.shockentertainmentinc.com/uploads/1/3/1/8/131871994/1971917.pdf
    • http://fitupo.braveandgentle.net/uploads/1/3/2/8/132816100/7969599.pdf
    • http://files.graciesroom.org/uploads/1/3/0/8/130813818/6355039.pdf
    • http://files.justforhimm.org/uploads/1/3/1/6/131607103/0fd20600a81.pdf
    • https://cdn.shopify.com/s/files/1/0437/8034/1917/files/madukuwonimaripemane.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/45071223958.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/55955704131.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/govudinixidesixokufipe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/6670346874.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/65005966588.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/zanudububumesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/66139101210.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/sivav.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4054/files/gurutezul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6741/files/34080094084.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/98557041409.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/asian_tigers_history.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/bugetopowasusa.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_off00005176.bin
8184bb3eed33891018372a804e7baec3336fe3ffc7efac4922aaa50b2dfe7757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5176 5376 bytes
font_01_sfnt_off00006394.bin
830e47fc89e2489e36a5f1c5836a9bce8d7b5e72746293025c9294de97474f9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 10040 bytes
font_02_sfnt_off000085ee.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85EE 4324 bytes

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