Malicious PDF — malware analysis report

Static analysis result for SHA-256 869e07174ee92cad…

MALICIOUS

PDF

51.6 KB Created: 2020-08-30 11:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35eaf4b32793f2b3400293cbb167f3f8 SHA-1: 984ea2a00bd98e4b03bc9961f29501fabb41c289 SHA-256: 869e07174ee92cad46419bb3be1b86345dc2ab2303fb3a32d8dab9a067d2cc38
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a lure for an advance-fee scam, directing users to a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and references to other PDFs, suggesting a coordinated effort to lead users to malicious content. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mopar+nationals+columbus+ohio
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_725656b0a7a34cee9ba910416be135d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc7047efdb6749d1a1d3edc6e23ecf0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4be0c0d0117e498eb718bc98e6ffc8cb.pdf
    • https://static.usrfiles.com/ugd/63d3ad_8dcb0445a3194215b03ade29bdac4d56.pdf
    • https://static.usrfiles.com/ugd/45e30f_9badaf316e8d40e58f1e05b628b5741d.pdf
    • https://static.usrfiles.com/ugd/4dd980_61b5ecfb3c0a464eb21931825dc31169.pdf
    • https://static.usrfiles.com/ugd/eda9ba_16c18be0ed4049799aa0c0ba20d8c128.pdf
    • https://static.usrfiles.com/ugd/02beb7_c5b8d82ba34f404dac687aed6b289924.pdf
    • https://static.usrfiles.com/ugd/1e32c2_26a44afd68534ee09254d3d286003e22.pdf
    • https://cdn.shopify.com/s/files/1/0428/7784/5671/files/gilerowatudafuwulikoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/kapemukodaxigezifunuler.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/danevin.pdf
    • https://static.usrfiles.com/ugd/a01749_c23b7e9cda9b47d0b83a8c63f4ac5797.pdf
    • https://static.usrfiles.com/ugd/b8c837_0759cb939b984ca4a676b2b052153210.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_off00008a81.bin
9dbc1085128dd0c99aa3510bb3908e48abe1d68803f046fec5ae3718613104fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A81 5316 bytes
font_01_sfnt_off00009c63.bin
5dd897233a8ea149fa192cb7f86ce0d1c8d91dfa74034a0a99a9feb9e3026b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C63 10908 bytes

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