Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9232dec61c63c96…

MALICIOUS

PDF

51.5 KB Created: 2020-08-17 14:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc2334925ebeba94ab290ed0632c22aa SHA-1: c0bcd08c20564bd94e845f2a16c980cdb88e3f0d SHA-256: d9232dec61c63c96c4fd387d0bf8379017f1c138dc8f0246206d7b7cbfeeaa83
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ark+survival+evolved+switch++size. The document body, though heavily obfuscated, contains references to game-related terms and the malicious URL, suggesting a lure for users interested in such topics. No scripts were extracted, but the PDF structure itself is used to host and distribute malicious links.

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=ark+survival+evolved+switch++size
    • http://files.cuastt.com/uploads/1/3/1/3/131398591/9247193.pdf
    • http://files.brain2gain.com/uploads/1/3/1/4/131438079/4691764.pdf
    • https://cdn.shopify.com/s/files/1/0439/0898/9096/files/pyridine_piperidine_alkaloids.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2857609843.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/bananas_and_pajamas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/94106129829.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/suvobolizojewuxajaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8809/files/34466862678.pdf
    • https://cdn.shopify.com/s/files/1/0430/8271/1201/files/nizazanadatutibumovojov.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/28907273310.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9309/files/primark_king_size_fitted_sheet_white.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6307/files/davubozidikatefofufep.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/91147380193.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/xidifevumedepenite.pdf
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/xejugawosasolapenek.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d3.bin
ca85e6d62336bcd2a349d1f865b74a47bf49f7acd0e86d35c6dcf6d10d7d90cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D3 5056 bytes
font_01_sfnt_off00007832.bin
d8927ebff4d623c7cdc6281153cf466b304a22b0f94e959d3b01df3b4afeb558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 10608 bytes
font_02_sfnt_off00009cab.bin
ed11755caded0387d221451bc566142f80035c1eda37e6d2bff7bc7d32684f2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAB 16336 bytes
font_03_sfnt_off0000b291.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB291 4324 bytes

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