Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d2baa1885c126b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-10 05:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c63014765776291175d6d40915518fd5 SHA-1: 4f737a3467d8869f4576a72658e09717421e7533 SHA-256: 92d2baa1885c126bb9ea111818f3033bb6b06a10b8a88c4030ab0af5f1faf63b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to a redirector service that is known to host malicious content. The document body text, though garbled, includes a URL that appears to be a lure for a free download. The primary malicious link identified is https://ttraff.com/pify?keyword=the+animator+s+survival+kit+free+pdf+download, which redirects to other potentially benign or malicious content. The ML classifier strongly flagged this PDF as malicious.

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=the+animator+s+survival+kit+free+pdf+download
    • http://bokagux.powerproductions.ca/uploads/1/3/1/4/131407406/supevivoba-dotuwatet-xonufi.pdf
    • http://files.usafagroups.org/uploads/1/3/1/3/131397973/notufafopudosinegan.pdf
    • http://sanav.drvegetableinc.com/uploads/1/3/1/4/131453870/fadea2c1f0.pdf
    • http://files.chsnjrotc.org/uploads/1/3/1/6/131607232/5cfd1ce02e2.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/jilap.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9818/files/2958463073.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/9146488643.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2402/files/98489239132.pdf
    • https://cdn.shopify.com/s/files/1/0430/1894/4665/files/98026038702.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/6538422642.pdf
    • https://cdn.shopify.com/s/files/1/0430/5525/1605/files/swgoh_prestigious_quests.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/rajenepadedagebubaruwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3055/2474/files/guitar_chords_chart_for_beginners_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/36854080146.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1741554469.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/vujozefupol.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f55.bin
cac1d6352dbfeb29df37252f2c400ac3dc55f7975fa1213aaef7b84bab227907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F55 5328 bytes
font_01_sfnt_off00006152.bin
98b9b8f282bce48837477edb3738d03a300dae028121b2d5725ef1eba46a256f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 10248 bytes
font_02_sfnt_off00008453.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8453 4324 bytes

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