Malicious PDF — malware analysis report

Static analysis result for SHA-256 7457241f59f0ae59…

MALICIOUS

PDF

64.4 KB Created: 2020-08-02 07:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8266dc5451c5fe9dee9acc7a4cb25c74 SHA-1: 5132e27a7f30291267db0b1124429ce3660e00f7 SHA-256: 7457241f59f0ae5904bbf0e093e311ff2b094ed701096d30129ee3376cfebd30
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=fire+red+legendaries', suggesting a lure to a malicious site. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to distribute malicious content or engage in SEO manipulation for malicious purposes.

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.cc/pify?keyword=fire+red+legendaries
    • http://files.vernbalicontractors.com/uploads/1/3/1/3/131398498/gesazepenokutofoti.pdf
    • http://files.brandingnetworks.com/uploads/1/3/1/3/131380288/5ed863.pdf
    • http://files.ervanariasaomiguel.com/uploads/1/3/1/3/131381428/zixoxanugamimi.pdf
    • http://files.quoisdesigns.com/uploads/1/3/1/8/131858592/ribanotubo-dakel.pdf
    • http://files.tylerwaynegriffin.com/uploads/1/3/0/7/130739982/pulekul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/87974677163.pdf
    • https://cdn.shopify.com/s/files/1/0435/3690/8439/files/98937696459.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/terevarobexavavini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3400/2086/files/mukumotojamevolev.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/69868214171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/rusew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4534/files/gobovuvadanudena.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/lemutovetike.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/14870253219.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/kb_to_gb.pdf
    • https://cdn.shopify.com/s/files/1/0428/4026/0775/files/30231472145.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_off0000b4c1.bin
253f095eb96f373908808267adc512b41e9c917b32f4f67bab9f98bf041b1ae3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C1 4948 bytes
font_01_sfnt_off0000c5a5.bin
c281fbad4b6a696997016c68b950e4412de41f47d7c44baaacbbd1d530f67b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A5 15324 bytes

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