Malicious PDF — malware analysis report

Static analysis result for SHA-256 8340c4f6218857fa…

MALICIOUS

PDF

67.7 KB Created: 2020-08-18 15:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7dbabe3b1f3a205036c26976f07990c SHA-1: 359618a01f96917e406cb88a6832574ace682233 SHA-256: 8340c4f6218857fa6e59275efe57332c490a2d0347cfc6e9a70e0871c2d1bb3d
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the redirector URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content widely, potentially for phishing or malware delivery.

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=baasha+digital+hd+video+songs
    • http://komib.colneyheathvillagehall.com/uploads/1/3/1/0/131070588/8446852.pdf
    • http://files.flight111.co/uploads/1/3/1/8/131856065/5867625.pdf
    • http://xasesaz.damaru.info/uploads/1/3/1/4/131453850/8785839.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/60246365968.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/46874693526.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/guzarorasimep.pdf
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/pasatiwuwanimokagafuwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/node_gyp_windows.pdf
    • https://cdn.shopify.com/s/files/1/0438/3817/7430/files/25017413338.pdf
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/92632937556.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/ford_3600_tractor.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/laxaruzututa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/5764328097.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009974.bin
44373485b65b41ae9b77a256648341d547c114ebf7377e0576188c4894011cb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9974 5100 bytes
font_01_sfnt_off0000aac6.bin
476e67db3f0e09e5c8a84c6f2e5a6f7a7d5000dbf232698088504e404085f545		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC6 11360 bytes
font_02_sfnt_off0000c7b2.bin
558259700cf3ef882366369978634f90d1971024d218deb681988300841a35d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B2 10764 bytes
font_03_sfnt_off0000ec05.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 16164 bytes

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