Malicious PDF — malware analysis report

Static analysis result for SHA-256 4962dc9030e7652e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 04:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e41b7dce3c98a1fb3a557b7792794580 SHA-1: c1e168e5cd3a1198f34928cc3db60eb588e6ac48 SHA-256: 4962dc9030e7652e53546fe836af8ce3e6c08c66904914719a73412ff3ea91c4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.com/pify?keyword=modern+architecture+history+pdf, which is likely part of a phishing or scam campaign.

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=modern+architecture+history+pdf
    • http://bexeb.annranderaadpottery.com/uploads/1/3/2/7/132740214/xulekefunanufip.pdf
    • http://files.derrickgriffey.com/uploads/1/3/1/3/131379506/jevufixunoralujukes.pdf
    • http://files.imagezphotostudio.com/uploads/1/3/0/7/130738548/4c2f8f59.pdf
    • http://files.hangyourquilts.com/uploads/1/3/0/7/130774965/ec7777a5cc37b4a.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/11683322640.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/mijebubevakegemobikute.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/sogipogev.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/38291473755.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofusibosaduxigagixuvoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/84726901742.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/ecology_and_environment_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/33307440872.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/93436868175.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/rarowepopipewowezegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7765/4942/files/texanetexiveg.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_off00007749.bin
178d6cb4dd5240689a832c62acc027c23b91e08bb39efcda3b040e171e9e3479
pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 5316 bytes
font_01_sfnt_off00008968.bin
10a13b6c41990d180d5308ac8784c096413ded19c835de7ce594497f376c01e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8968 10076 bytes