Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a449856c60fcc1…

MALICIOUS

PDF

59.2 KB Created: 2020-08-03 10:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b4b3c5b61172352ad28e2ef345dad7b SHA-1: ace8e5c6171f43c87ba526788b0a8b1b818550a1 SHA-256: a7a449856c60fcc1079e68b62ea5680729552f8468bbd3d807217acad37b1a64
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=absolute+value+java'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external PDF links, with the primary one being 'https://cdn.shopify.com/s/files/1/0431/9834/9471/files/fumew.pdf'. The document body is heavily obfuscated but contains the same redirector URL. The combination of these factors strongly suggests a phishing or malware distribution attempt.

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=absolute+value+java
    • http://files.evanobranovic.com/uploads/1/3/0/7/130776478/relupugat.pdf
    • http://files.lindamarchus.com/uploads/1/3/1/8/131856877/keruw.pdf
    • http://files.bi-radialmatrixintro.com/uploads/1/3/2/7/132710624/6e1e09.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/fumew.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/8153574240.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/65387169748.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/feel_bad_or_feel_badly.pdf
    • https://cdn.shopify.com/s/files/1/0439/4532/8808/files/23064187751.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/33403278770.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5754/files/demijuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/85460217722.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/git_not_currently_on_any_branch.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/33753074398.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7202/files/4711880174.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/karevodojofo.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_off000095f6.bin
280f86e8cd7dde9f34a8e87161d6700f391b406eefb8751bfc07ba315030d380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F6 4848 bytes
font_01_sfnt_off0000a688.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA688 1800 bytes
font_02_sfnt_off0000af16.bin
3adac6a91df7ff04ce766387a37ac6e5acd84be44a4b2b6750fd5afc92a7d98e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF16 15664 bytes

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