Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d6e8402860b35…

MALICIOUS

PDF

65.8 KB Created: 2020-08-11 07:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1343fa2d94bddec11ca19fc51df66de SHA-1: 562c314d3b6ee3dbaed3e850ecdba11d6a43e866 SHA-256: 612d6e8402860b352d327750b2e57b4f5329104007e3d50ac19ada6935039e40
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text that appears to be a lure related to 'valores sociales pdf'. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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=valores+sociales+pdf
    • http://files.heartlandcustomfarmtoys.com/uploads/1/3/0/8/130814101/bavijowuwazi.pdf
    • http://files.uptownchurchcharleston.org/uploads/1/3/0/7/130776142/07f64f5c4066.pdf
    • http://files.sportsfactory.shop/uploads/1/3/1/4/131409090/36796.pdf
    • http://files.t3northloop.com/uploads/1/3/0/9/130969522/gelixagikuzeki_xotedaru_tatupiguwazus_rawejevag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/bovudaxuxupiviteb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/sixegebusibireta.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6251/files/28472596487.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/bagipugumivuzogodazujoner.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/95681320268.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/17725043743.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/the_three_musketeers_by_alexandre_dumas_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/wafija.pdf
    • https://cdn.shopify.com/s/files/1/0432/8403/7792/files/history_of_black_body_radiation.pdf
    • https://cdn.shopify.com/s/files/1/0435/6790/6979/files/mugazulugipokadeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/tafajebidizoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/79209846500.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/waxosejazusivu.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_off0000c2bd.bin
d758b45d6c790bd7813b06024cfdc53e48ae58146097c2adc0c7de207d5549bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BD 5116 bytes
font_01_sfnt_off0000d431.bin
62ada384eabd6f33f04066c9e332e6af44cf6f3d05b1db1e102c75845a72ee18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD431 11256 bytes

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