Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1bcb7e0b0a519c9…

MALICIOUS

PDF

58.9 KB Created: 2020-08-16 17:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 051a528732e022f4be17a15dfbc066fb SHA-1: a3c714e1e531c4b4099e4800d018ac00ac23f70d SHA-256: b1bcb7e0b0a519c92efbe1f0603c25193cf385dd5b1059e0c0e8828c4c502cc3
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.ru/pify?keyword=masih+ft+arash+ap+goli, which is likely used to redirect users to a malicious site. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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.ru/pify?keyword=masih+ft+arash+ap+goli
    • http://files.suenamiart.com/uploads/1/3/0/9/130968994/972923.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/openbsd_vs_freebsd.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/ap_calculus_derivatives_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/18707009910.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/juwurugojubovojotuze.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/18134472268.pdf
    • https://cdn.shopify.com/s/files/1/0430/5931/4841/files/mugaxogowige.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/41370138081.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/rosekevisawu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/premadonna_love_and_hip_hop.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/alcatel_lucent_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/61817984808.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/
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/juwurugoj

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b2c7.bin
c5fed32a3206396aa4c96c90f126d2720437d812a1e501d64971c5198f441499		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB2C7 23632 bytes
font_00_sfnt_off00006ed1.bin
93d88e224e58fa105a7a3493d3226947e0af60b2161f3ffab9106ce3d2cdb5e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED1 5168 bytes
font_01_sfnt_off0000805f.bin
5d45d38df9adec2e3cfcd2cd5ee04403aa124044d297f34bf6e0561045def258		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805F 16136 bytes

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