Malicious PDF — malware analysis report

Static analysis result for SHA-256 700ddb598768b5e3…

MALICIOUS

PDF

33.1 KB Created: 2020-09-10 05:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0405583424f37c649c2b4fd5b19f86bc SHA-1: 7fee4e3c48b7a7f371bf00feccb13e9f62f1ae7b SHA-256: 700ddb598768b5e3d5cce2f309128eccffca9fc796c6207da6a38c92e109d9b7
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a weather report, which is a common lure for phishing or malware distribution. The link points to a known malicious redirector, indicating an attempt to lead the user to a harmful site. 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.link/wix?keyword=berlin+weather+report+10+day
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a86d68_deb38400eba04ec3ad635f7940372af9.pdf
    • https://static.usrfiles.com/ugd/6240f8_fc766f7891a6429c8c7b150a833da791.pdf
    • https://static.usrfiles.com/ugd/7ff653_c385a65da38f47b0af94f880bd55c064.pdf
    • https://static.usrfiles.com/ugd/8bf3fc_867f574d1e2946da9bb639f902ee6c1a.pdf
    • https://static.usrfiles.com/ugd/6df952_9a2ff4f91b6c4cbe81daae9960778a53.pdf
    • https://static.usrfiles.com/ugd/625844_a099641ced844126b60b06cf4c70dca8.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/postman_api_for_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0457/6618/1028/files/deadpool_game_ps4.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/7030094364.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/mifemurafiwegujiram.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0354/files/14904740048.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/bohol_tourist_map.pdf
    • https://cdn.shopify.com/s/files/1/0432/6070/6971/files/dejujodelipufesevawilokep.pdf
    • https://cdn.shopify.com/s/files/1/0461/9206/6709/files/56434498315.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_off00004632.bin
b88aa537fc1f466109104487852b5164c2e8c9e8a9a48a04ba61b90792a88c38
pdf-font-stream PDF embedded font (sfnt) at offset 0x4632 5308 bytes
font_01_sfnt_off00005851.bin
1cbe65993f34130a366d687cd7ae50f5b1c1b849ef8a16870ec8ee4af3186d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 9224 bytes