Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf17c3507de35b6…

MALICIOUS

PDF

41.4 KB Created: 2020-08-20 00:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8460f995612082ef34a30f3c3a2ef4a SHA-1: 248e7cae62e1f04606b536c1d49f181b053ba016 SHA-256: fcf17c3507de35b63ba8b204af275ea62dd6056ae953c5af097668bc368c1387
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to milk pasteurization and includes the malicious URL. This suggests a social engineering attack aiming to trick users into visiting a malicious site by disguising it as a relevant PDF document.

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=pasteurization+of+milk+process+pdf
    • http://files.alexrawfootage.com/uploads/1/3/1/4/131437181/fagasafemaxed.pdf
    • https://cdn.shopify.com/s/files/1/0458/2368/8867/files/sazotomolideko.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8637/files/autodesk_inventor_2020_tutorial_francais.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/82215675393.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/injury_report_nba_rotoworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/22748656210.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/79831738261.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/keperuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0315/files/38354143396.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/nowoloxizorumejis.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/75436914840.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/bmdp_statistical_software_manual.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_off000064c0.bin
c809a2da6e244bba9eb187226a832f671ccea80619109fb838ef1f30a88f892e
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 5416 bytes
font_01_sfnt_off00007715.bin
4e18369c312e803e2457b3f1d995a4c9f1021676b15269ec15fd61f546ef6d2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 9920 bytes