Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc59e525649075f…

MALICIOUS

PDF

58.0 KB Created: 2020-09-09 05:16:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb67c5a166f2d187279990dab6aa589c SHA-1: 5a08fcf30f64cb0f123d4cea7f8b8ed99279b28b SHA-256: 5fc59e525649075f12d47baf9a4cb9b06a29f8fa4ab7dc4ae4f3fcb53a029f18
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to movie downloads and the malicious URL. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm designed to distribute malicious content or engage in SEO manipulation. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=new+tamil+movies+free++hd+tamilrockers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/79149738378.pdf
    • https://cdn.shopify.com/s/files/1/0434/6763/6902/files/risuxeluro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/gavugididefumolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/30896086289.pdf
    • https://static.usrfiles.com/ugd/1cfe37_da7f45f48c744ec0b2211ab84164b627.pdf
    • https://static.usrfiles.com/ugd/bb4607_dcb8ff81619a4cd18385fa3ad38a2cd7.pdf
    • https://static.usrfiles.com/ugd/0dd040_97a35e579c4d4743af87d31d8692bb97.pdf
    • https://static.usrfiles.com/ugd/7c3584_4b6593e7ded949528a596efab5f4d770.pdf
    • https://static.usrfiles.com/ugd/b8c837_f81ec92353d142749aa3b758d9117697.pdf
    • https://static.usrfiles.com/ugd/cc03df_c5732f8263bf4c04b774a06c4debe978.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076fa.bin
5417eb4035e3d793938f41b268a457c817d1f47456344497ae8b6fa93f9a091e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FA 5128 bytes
font_01_sfnt_off0000887c.bin
7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 1936 bytes
font_02_sfnt_off000091c3.bin
bd37f58b3629c4d5fad3c191836c51e38b03a11e03aab6996719352ed191bf3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91C3 10904 bytes
font_03_sfnt_off0000b73d.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB73D 16164 bytes
font_04_sfnt_off0000cc52.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC52 4324 bytes

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