Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b252594afb8910…

MALICIOUS

PDF

56.2 KB Created: 2020-09-01 05:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c171a65db162facbdd8722f41e812b0 SHA-1: 284653cdd1264812f963d171bbd748f0a9e4ef34 SHA-256: 08b252594afb89102079aaf87cec9ae87fd7a1881320e34641a312e88253b23b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a deceptive link disguised as a game guide, which redirects to a known malicious URL. The document also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to malicious infrastructure.

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/wix?keyword=baldur%2527+s+gate+map+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/vixikaxovevedefovelaze.pdf
    • https://cdn.shopify.com/s/files/1/0435/8724/0093/files/21192898858.pdf
    • https://cdn.shopify.com/s/files/1/0432/8036/7780/files/rebawoxadadaridozusef.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/16746270558.pdf
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/pdf_password_remover_portable_full.pdf
    • https://static.usrfiles.com/ugd/fbccce_9b2907ebe7474f1b80799f29cb441fa4.pdf
    • https://static.usrfiles.com/ugd/9e53d4_f5b4bc2f826e4604b93bd4155eaeaaac.pdf
    • https://static.usrfiles.com/ugd/a91264_80592708b78d4479883f65ef1d10dec9.pdf
    • https://static.usrfiles.com/ugd/cf14a4_f8c58a266bd9437aa844c6d891bb6343.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91a8d6cd1764ee89fb98ba89efd4be0.pdf
    • https://static.usrfiles.com/ugd/10e3af_fba8dd422ae945ccbac3d04a92d1893b.pdf
    • https://static.usrfiles.com/ugd/b8c837_68a5d3c55f344a95a4998d1bb1290c7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_62820aa7407f4a74aae379d055a23c7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6dec77c6d46b470ea3f56922e1c7dda0.pdf
    • https://static.usrfiles.com/ugd/c63dba_d444c8c8a3b349ca967d8e4cdcbe4245.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000a8c7.bin
c5ed9d434792076d7141e6d72e82207471623b85e7e3be78333d827329fff9a5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8C7 17844 bytes
font_00_sfnt_off000073f6.bin
19dc2424e83bcf287402b711a0f3bcdc1f35d4a67dde87d8a9f0b3bd11d0434f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73F6 5028 bytes
font_01_sfnt_off00008512.bin
55c0a799ca313d30f8a67b887f6a6a4213ef8db13e0a918fe401227f5184927a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8512 10440 bytes
font_03_sfnt_off0000c3c9.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C9 4324 bytes

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