Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c03988aa8a5c421…

MALICIOUS

PDF

45.8 KB Created: 2020-08-07 15:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31a94633ceb7fbae1527db787af81c79 SHA-1: c237d87f6814a643a7c4cb29041281b932b5a550 SHA-256: 4c03988aa8a5c421cc60777b44e1cdcadc5a8732713450d6de80c09281c558e6
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm or SEO poisoning tactic designed to drive traffic to malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL and references to PDF files, reinforcing the attack pattern. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=terry+eagleton+the+ideology+of+the+aesthetic+pdf
    • http://files.storylabgeographic.com/uploads/1/3/0/7/130775434/90f5062452c7191.pdf
    • http://files.gulfsidesports.com/uploads/1/3/0/7/130776714/nugisurofep-vuloxise-xojuzobepa.pdf
    • http://files.excelnlife.com/uploads/1/3/1/3/131381352/jixameno.pdf
    • http://files.xmmphoto.com/uploads/1/3/1/4/131437254/a4b55fc7.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/vexafosuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4898/3959/files/blowpipe_ni_no_kuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/nagulixabotebusukubilaxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/sekowazazedukadon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/cinderella_full_story.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/1698375560.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/innovators_walter_isaacson_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/38498689074.pdf
    • https://cdn.shopify.com/s/files/1/0455/7009/7317/files/warhammer_40k_necron_codex_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/26949229715.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/poditikijuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/42404222240.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/vigaxamazegivoxeb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007393.bin
d63a3707d0127a3646ddde1893f557a9d655fc8efc5ffaabff5db25c254164fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7393 5468 bytes
font_01_sfnt_off00008635.bin
93e76cdb8f0df0c86191f9fcbd60a6e2f5d33d85913a3893fd14288032456a51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8635 10316 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.