Malicious PDF — malware analysis report

Static analysis result for SHA-256 66011ac56e6b9b5c…

MALICIOUS

PDF

53.6 KB Created: 2020-08-01 09:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f8ba6b2b1133423a8cb34ebf2431735 SHA-1: 4eb34adfa161a340a298b9c5fe43877d46c50e7c SHA-256: 66011ac56e6b9b5c783921471cf18db87394b680c10eeceee5360edb8658c441
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the embedded URL and link farm structure suggest 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.com/pify?keyword=1-+99+fishing+guide
    • http://files.winningtimefarm.com/uploads/1/3/0/7/130776423/xesofunofevuj.pdf
    • http://files.shaunagoodingreiki.com/uploads/1/3/1/3/131384335/pugizisigefokez_bodogetibaje_lupikazipuluwa_rulirefexiduz.pdf
    • http://files.truth-publishing.com/uploads/1/3/1/4/131453215/386420.pdf
    • http://files.neeleyandneeley.com/uploads/1/3/2/6/132681672/1235787.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/jaxematet.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/losezirujot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/46223970982.pdf
    • https://cdn.shopify.com/s/files/1/0431/9290/9987/files/docker_registry_github.pdf
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/38554048182.pdf
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/selibij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/zigufefogaraxenitofusigo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/66090565560.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6663/files/sekidipoxovupezepugub.pdf
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/bitch_ass_nigga.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/66098555890.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1289/files/4781616704.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_off00008b5e.bin
c7a218f20c98a2557125cad41c4d655e82c7f93b8b90dd1567c4e32993e66e35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5E 4976 bytes
font_01_sfnt_off00009c5e.bin
4cd4c93425f418e2f52ba7fe7fe2d771832185156321c3ef9012b588b61501c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5E 14124 bytes

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