Malicious PDF — malware analysis report

Static analysis result for SHA-256 07709ce496a8003c…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 18:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ebdc136229406f51da58582e840fe41 SHA-1: 9becb8930bf8a8f339d244d3bf8d990f2b077de5 SHA-256: 07709ce496a8003cd0f350232a662a2e365e9505c22011f31382a16d038c0cde
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised as a search result for 'volvo on call app android'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous other PDF links suggest a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicates malicious intent.

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.ru/wix?keyword=volvo+on+call+app+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0a0016_66752d66d47e4e73b0502b6ff6374196.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd215cc5a463431297677abf86822acd.pdf
    • https://static.usrfiles.com/ugd/1e4819_676282d3dd37416d93fc92fa544bca88.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9030ce3d0a24487bfa3df5b395c9017.pdf
    • https://static.usrfiles.com/ugd/b8c837_a50c5eb6719045658286e5b0bcf964b7.pdf
    • https://static.usrfiles.com/ugd/a48928_62d1086609804c1f9708a0710c04083e.pdf
    • https://static.usrfiles.com/ugd/d55797_ee89371e876447d8ab5ada0006d1baa2.pdf
    • https://static.usrfiles.com/ugd/c162b3_e75caa21b1a2415d8206eeeb600e8837.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e2cead47f8b4fab9c1dd63167d7ba41.pdf
    • https://static.usrfiles.com/ugd/eaf48f_cc97379fef8144f3b0b5ef3a3d071a72.pdf
    • https://static.usrfiles.com/ugd/55f640_818f4da777624639bc027b83462536d2.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/bedenazaluguresawikorar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/beyond_the_sea_robbie_williams.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/xopemodejogulodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0300/files/sawadomef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006631.bin
b675e895ec574535b39978bd4f0723c7141a231288b2a751fd072ea2728271bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 4912 bytes
font_01_sfnt_off00007701.bin
9ee081d284f11cd73c6b79298926c66c6fa6a1fd20396eb8e4197c4f47dac67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 10556 bytes

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