Malicious PDF — malware analysis report

Static analysis result for SHA-256 812983c9fb8d4b64…

MALICIOUS

PDF

40.6 KB Created: 2020-08-31 07:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbb9e30fa3c731b918012becb3f1fbcb SHA-1: 463fc79ffd9bbb38e6797cf53eb699f62161740d SHA-256: 812983c9fb8d4b642fe812b0b0beeaf6761868ab9b211b13c0309c32ada70551
154 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a malicious redirector URL, disguised as a graphing calculator emulator. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO manipulation tactic to increase visibility. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attempt.

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/wix?keyword=graphing+calculator+emulator
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/6812155704.pdf
    • https://cdn.shopify.com/s/files/1/0429/7129/9999/files/15745451777.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/gabegutizese.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/bavizelozozasu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/19390526110.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/7854269269.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopafomapezujiwowab.pdf
    • https://static.usrfiles.com/ugd/e5412a_d5d97d7b0e2940e39a3bded219eea3aa.pdf
    • https://static.usrfiles.com/ugd/afe78f_7771c2d883b04c81836a0f38884ab08b.pdf
    • https://static.usrfiles.com/ugd/de3d83_272bca00af3440e5bb8027612fe3b879.pdf
    • https://static.usrfiles.com/ugd/5ad03d_2f14927a484744638c3f9cea6327dc15.pdf
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/pakuxizupitujemujego.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/56170701877.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7582/files/ambareesha_video_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/84622397434.pdf
    • https://cdn.shopify.com/s/files/1/0463/0895/0176/files/defavovuxiwukodasuvadupo.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_off00006146.bin
c9dfffdedbecdc299ec17f7090b050f872a789997697480b828c7f2b4ce464b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6146 5200 bytes
font_01_sfnt_off000072cc.bin
76760aee78e87d66524d23a9355767bc1f9cf5bc27d7ca26ff86eb6bea7d427b
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 10248 bytes