Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e710c3eacd895e0…

MALICIOUS

PDF

47.2 KB Created: 2020-07-30 22:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eae445bcd2683bbdbd781b41e1114be6 SHA-1: 6f92fbf001e4e877f51a0c00720fe330468ba1a6 SHA-256: 9e710c3eacd895e0679656543ad05ff84b22c4f2352e81f3dacbe65469606f8f
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document is designed to lure users to a potentially harmful external site. The presence of a large number of embedded links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier also 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.cc/pify?keyword=mordiendo+manzanas+y+besando+sapos+pdf
    • http://files.scentidy.com/uploads/1/3/0/9/130969003/ferufuz.pdf
    • http://files.rhythmsofgracecommunityfellowship.com/uploads/1/3/2/6/132696483/weworotirobok-ratepelaz-gavawasobaxita-pusewive.pdf
    • http://files.100wwclickingcounty.org/uploads/1/3/2/7/132740417/lapoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/78199088861.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90142435821.pdf
    • https://cdn.shopify.com/s/files/1/0435/4975/3493/files/venanozovuzudogotejepono.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7287/files/serebixikati.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/40906567582.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5706/files/63508809934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/69456416578.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/65784389050.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/89343002707.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/2543825088.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/kafogawegidusebolumoxav.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_off00007772.bin
9023c25a49b70b5e45c4bb1437cc87d74a3d31c5f9a3cdbcced342b13acfebda
pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 5160 bytes
font_01_sfnt_off000088e9.bin
0da20d7955e9e1a1548e7439a0251c2b1ff848969b9ced1a26bb327706a37dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x88E9 11332 bytes