Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e466ec4f8e5e6c…

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 13:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 349046ec2bf1fd6fedfc1f3a034c3120 SHA-1: 46e220e65526eda12dea026589800e3debd75927 SHA-256: 52e466ec4f8e5e6c3971786ebebeecb9c2e10179319f690f5f36ace5ef773703
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The document body text, though heavily obfuscated, contains the URL "https://ttraff.cc/pify?keyword=honeywell+programmable+thermostat+manual+pdf", suggesting a lure to a malicious site disguised as a search result. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link confirms malicious intent.

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=honeywell+programmable+thermostat+manual+pdf
    • http://files.canalscapecounseling.com/uploads/1/3/2/7/132710690/sidatokuwaj-gukutitafela-kozawukav.pdf
    • http://files.oneined.com/uploads/1/3/0/7/130775085/bulawiro.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130813132/77afc.pdf
    • http://files.2peter24.com/uploads/1/3/1/3/131379761/vudukuzakaz_rakuku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/79659868462.pdf
    • https://cdn.shopify.com/s/files/1/0437/3292/6616/files/6821363326.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8743/files/gabunuvozage.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/tidupize.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/50153690250.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/15844208294.pdf
    • https://cdn.shopify.com/s/files/1/0431/0777/8711/files/92082478044.pdf
    • https://cdn.shopify.com/s/files/1/0439/1128/2840/files/gubirixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sikotifukiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/94408477075.pdf
    • https://cdn.shopify.com/s/files/1/0433/4528/1183/files/banivujasedoruxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/28855165039.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000663f.bin
7ccb486a8a1e23f532fc9431bafc3395e9c2f467d835eb7751ffadc0fdaad91a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x663F 5584 bytes
font_01_sfnt_off00007918.bin
a25d734342227d71c2ef43b059a36f8d1e46182e6c177866b3c5c13801b3f458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 9972 bytes
font_02_sfnt_off00009b31.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B31 4324 bytes

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