Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6b8200f046d310…

MALICIOUS

PDF

44.9 KB Created: 2020-08-22 05:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a12b759be3aab15018975e8423a998ed SHA-1: b7dd6386c798ea523b413c855136183966bc5335 SHA-256: fa6b8200f046d310333b1563f93dd82141fecaa59d9891fd9b4fde48bcbcfb98
150 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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'New Zealand harness racing form guide' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=new+zealand+harness+racing+form+guide
    • http://files.anthonydramsey.com/uploads/1/3/1/8/131856125/nagurunuruvef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/zoboruruxisexevepimigol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/fenawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/82271374761.pdf
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/61010411405.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0173/files/velajogipenoveneforoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/833625619.pdf
    • https://cdn.shopify.com/s/files/1/0436/6529/3462/files/mogigibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7593/6157/files/game_offline_android_2019.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_off00006ff4.bin
3976688c9c1b699819da495b3c69444ff26d4569e773c683c788fcb81065ef8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF4 5548 bytes
font_01_sfnt_off000082b9.bin
857a40caf71957e744a9afc51135dc97883000dfd94b53cc3bf37b14c32498e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B9 10588 bytes

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