Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c6d35b3f85502c…

MALICIOUS

PDF

43.5 KB Created: 2020-07-31 16:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 184f2bda1275fbd3f13c74df0019509c SHA-1: 17432ce5a448b3eb8b5fdbc9a795310a9f7481f3 SHA-256: f8c6d35b3f85502c7d50cae12beaf644979dbcf3b863fde8b654ea4cfae57954
152 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.cc/pify?keyword=ai+for+game+developers+pdf'. This suggests the document's primary purpose is to redirect users to a malicious site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the embedded links are sufficient to infer a malicious redirection attack pattern.

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=ai+for+game+developers+pdf
    • http://files.opunakesurflifesaving.com/uploads/1/3/0/8/130814513/gezitowejukejekojuko.pdf
    • http://files.affordableinspc.com/uploads/1/3/1/3/131379189/dogivigukaromez.pdf
    • http://files.berbeobros.com/uploads/1/3/1/3/131379149/9777868.pdf
    • http://files.just-verandas.com/uploads/1/3/1/3/131379045/xobuxisedujus_wekabod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/lenax.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/70939949207.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/devijep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/46766937156.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/roveri.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/65168224013.pdf
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/tekafexoven.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/jofadetajixa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/finodoreguxajujakitofi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/19115534132.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/tikujizanirudi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/takopoxokezuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/20367389799.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_off00006bc9.bin
8332dc175f5842d9846aaf0195e97f076b1ef6bc5ee23f12872ed6cadd8617ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC9 5412 bytes
font_01_sfnt_off00007e25.bin
f5f0aebcf871b21957b4cf37d4be312b427fb2e47df881d1011ff9e140286222		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E25 10260 bytes

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