Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b864c378ba1c88e…

MALICIOUS

PDF

49.9 KB Created: 2020-08-13 02:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1639c63a2e144c5322c9afb0119d57c SHA-1: 417f5f386e0929fb2a1813ad5f94457e23b102b5 SHA-256: 6b864c378ba1c88ef98870e204f2151a9abe9e07005180c4e6ee0c666143eb2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Axelos prince2 agile pdf' and includes multiple Shopify URLs, suggesting a tactic to generate traffic or lead users to potentially malicious content. 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.com/pify?keyword=axelos+prince2+agile+pdf
    • http://files.michellerodesillustration.com/uploads/1/3/1/3/131381900/825042.pdf
    • http://files.ruthbrambleceramics.com/uploads/1/3/0/9/130969987/xotubuwelugi-podupovazo.pdf
    • http://files.pccglobalmin.com/uploads/1/3/2/7/132712661/tisiwowixip-laketat-bexomiloravi-wawofebu.pdf
    • http://files.ironstonemeadery.com/uploads/1/3/1/0/131070894/5db44243.pdf
    • http://files.robertupstone.com/uploads/1/3/1/3/131382330/7d732c4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5204/7263/files/didojoxoresitabi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/opposite_of_always_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/jetusafabivorula.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/rogasakorudagaretisatunod.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/15728042616.pdf
    • https://cdn.shopify.com/s/files/1/0439/2956/7387/files/computer_post_and_beep_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/57091247417.pdf
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/finukumoridejupamexo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9436/6626/files/xusegowaligoxovumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/femomarutelibumawetavugij.pdf
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/public_holidays_in_karnataka_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006daf.bin
427dc9e09724a566160181dc150cc4c20beef10797770e457cabfa9f6d5396cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5512 bytes
font_01_sfnt_off0000807b.bin
1ed075c2c23f66c0352f264bb049c1946ae0a0a1ccce12ff2c88fb5111ddb80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 10192 bytes
font_02_sfnt_off0000a38f.bin
54edb9499952c0a8d7e6215c8cf8ce213085ed7723d508bbe872211038d63135		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA38F 16872 bytes

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