Malicious PDF — malware analysis report

Static analysis result for SHA-256 363f46afc23d5894…

MALICIOUS

PDF

63.6 KB Created: 2020-08-05 13:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fbaec1a3f54565173dd6af1e59cc77e SHA-1: b4a6ba8e81ffe4e022ecfbe72aa08b2cd290eee1 SHA-256: 363f46afc23d5894b20d5d4199059bd1c6223741fe6136d2125d71461df16761
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One specific link, 'https://ttraff.cc/pify?keyword=great+gatsby+chapter+7+pdf', is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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=great+gatsby+chapter+7+pdf
    • http://files.weighinginwithtlc.com/uploads/1/3/1/4/131407423/feruda.pdf
    • http://files.wildflowerrunner.com/uploads/1/3/2/6/132682822/695909.pdf
    • http://files.corneliapeckart.com/uploads/1/3/0/7/130740442/bozebusijewaw.pdf
    • http://dolur.bearhugquiltworks.com/uploads/1/3/1/4/131438177/wexutuxub-lidiwep.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/6997/files/kunubomevoneniji.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/54972270021.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/86084635022.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/wuxomafiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/15961618606.pdf
    • https://cdn.shopify.com/s/files/1/0433/5055/6821/files/35352844461.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/bakiwaferarelobekaripu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/77655054326.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1142/files/71018561750.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_off0000bbdf.bin
c34416dd4355a5bbb3130a9fb4dcf545f324559a01fbda6061e2b9a7cdcb5147
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDF 5740 bytes
font_01_sfnt_off0000cf76.bin
a03f31529ed6c7826c0469bd2d2bb936e27de793bee5c10bbf408268c7909912
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF76 10088 bytes