Malicious PDF — malware analysis report

Static analysis result for SHA-256 15380917b70d1f9d…

MALICIOUS

PDF

46.9 KB Created: 2020-09-01 09:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ebbab00edcfe44e373221e2339619bf SHA-1: b8a014e93c62fc028c900f9046643bd5a1f9d691 SHA-256: 15380917b70d1f9d7402b30ebe0497483208a1f765b4ab4e27dc2f3dba60e61c
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to generate traffic. One prominent link, 'https://ttraff.com/pify?keyword=speedometer+for+android', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting a lure to trick users into clicking it. The ML classifier strongly indicates 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=speedometer+for+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/wijedinunobeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/infrastructure_high_level_design_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0254/3778/files/exercices_francais_adjectifs_possessifs.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/doom_4_classic_maps.pdf
    • https://cdn.shopify.com/s/files/1/0435/7731/1391/files/xosisodorudomotisefepuju.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/nitarugopawapeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7415/files/kivaxotojekigufukato.pdf
    • https://cdn.shopify.com/s/files/1/0450/2247/8494/files/puzupupowalejireni.pdf
    • https://static.usrfiles.com/ugd/efb3f0_a4c626202396430a88d01fbf74839305.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15e2bb99a464cf48c44de4e05ca7842.pdf
    • https://static.usrfiles.com/ugd/b8c837_53aab9d6d5c14b72a94ac2b9ac3f740e.pdf
    • https://static.usrfiles.com/ugd/ea78e0_81fa10b21ded400da321f94061744872.pdf
    • https://static.usrfiles.com/ugd/b8c837_bad715f8c16140a1a66ce1fbd0b3af5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/zuvomewatibugudebat.pdf
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/65614731698.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/33606919583.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ce3.bin
ccaa1f9e99688173698caae027c15e434e534c15428e8fe22b1915f6fa28185b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE3 4868 bytes
font_01_sfnt_off00007d49.bin
a745167842df724407c367c1cff9c3ddf787a8013a0112ee9b5ff34e2e0196f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D49 10444 bytes
font_02_sfnt_off0000a0f7.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0F7 4324 bytes

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