Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aefd002631019a2…

MALICIOUS

PDF

45.2 KB Created: 2020-08-03 07:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: feac59af4c2afe214a7bdff8afe10c00 SHA-1: f2b5ed37c14f0891d76a1b60a47fe8509f2b4785 SHA-256: 7aefd002631019a21aa16bec13bd91eecc82e7e7ae92937056dc5b7af4001828
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru', which is flagged as malicious. The document body, though partially corrupted, includes the same URL and text suggesting a lure for a PDF download. The presence of numerous other PDF links, some benign and some unknown, indicates a link farm strategy, likely to obscure the malicious destination. No scripts were extracted, but the primary attack vector appears to be a malicious link embedded within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=just+one+night+gayle+forman+pdf
    • http://files.artinwales.com/uploads/1/3/1/6/131637562/xuziji-girikiso-sukosolifekom-tizur.pdf
    • http://files.spygamereviews.com/uploads/1/3/0/9/130969356/pojegeboniregudarap.pdf
    • http://files.rahanaesthetics.com/uploads/1/3/0/7/130775229/kadufulabibuz-levifemileviner.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/nijusuvive.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/does_no_mean_no_in_every_language.pdf
    • https://cdn.shopify.com/s/files/1/0438/2887/1318/files/photoshop_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/9471/2228/files/55300946432.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/82145168189.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0432/6404/9318/files/toxanibewagu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/kirby_sentria_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/abas_3_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/10152741467.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/javojire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tawoxusabevesumaxev.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_off00005b8e.bin
542d822aeb4599b285a319d4ba035a37c39901364be78b125273b0d80244b1be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8E 5544 bytes
font_01_sfnt_off00006e4a.bin
f84da462e28f27224f3ae9753186956e085af36e7f289f3802ad786c8417a726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4A 10324 bytes
font_02_sfnt_off000091dc.bin
2ffe0065ad8a4efff0e8f9db3fffdc285a08b07fe6b7db3d69aed5e68b96de1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91DC 16248 bytes

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