Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc532da3ff123db6…

MALICIOUS

PDF

48.0 KB Created: 2020-07-31 15:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2940d18290f2273f771bdd6b87eba6f SHA-1: b12904cca7908935b0b2fcaca1dc37bbf6d8022f SHA-256: bc532da3ff123db635d615a85838ae4d56e50b466eca66bfecad8b63d332eb2a
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm for SEO manipulation or phishing. One of the primary links, 'https://ttraff.cc/pify?keyword=auto+tunes+torrent', points to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, preventing a deeper analysis of its content.

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.cc/pify?keyword=auto+tunes+torrent
    • http://files.salasirian.eu/uploads/1/3/1/4/131454899/5687099.pdf
    • http://files.stockmasteragri.com/uploads/1/3/0/9/130969300/kolugo.pdf
    • http://files.mocajunspice.com/uploads/1/3/1/0/131071067/970246044f.pdf
    • http://files.christinelanphotography.com/uploads/1/3/0/7/130738790/gamurowunarabeloxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/lewixisufasisapojobobol.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/xujisim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/18893624719.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lugoxiletix.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/wenox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/mejekubejowexazusuguwoli.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/tulelawamula.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/35060769614.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/tinidexubewexa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/23538753030.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_off000080b9.bin
3181112d64c3c83a007a423d13c333c7af79d1108f1932374a088d2e4ba6704d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B9 4260 bytes
font_01_sfnt_off00008f34.bin
63eb525fed846a1ba6cc113b99e949e1d64936b90d4357a996ce70808ee72ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F34 10516 bytes

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