Malicious PDF — malware analysis report

Static analysis result for SHA-256 fde78e18586bd79e…

MALICIOUS

PDF

54.4 KB Created: 2020-08-24 18:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afc9bebef2e59a72f4ec55c2dfed4e4f SHA-1: 5238e1898b8390f0bc8de71ebc346dab5d854bec SHA-256: fde78e18586bd79e3387e01160df44258b0d185c29921f666be90549e9fe7d3e
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of external PDF links, indicative of a link farm. The primary malicious URL identified is https://ttraff.com/pify?keyword=arabian+desert+information, which is likely used to redirect users to a malicious site. The document body, though heavily obfuscated, also contains this URL.

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=arabian+desert+information
    • http://files.yavmagazine.com/uploads/1/3/0/9/130969352/c2218.pdf
    • http://bedivupak.ihopeyourlife.com/uploads/1/3/1/4/131438474/fefiwize_lipunowupid_sizoliz_bigese.pdf
    • http://peluzar.abbscommonscents.com/uploads/1/3/1/6/131636813/10fac4643.pdf
    • http://desixes.emilyvanmeter.com/uploads/1/3/0/7/130775354/totedakajina.pdf
    • http://files.oldpueblosoapery.com/uploads/1/3/0/8/130813906/kumewajipimaz.pdf
    • https://cdn.shopify.com/s/files/1/0445/6205/5332/files/patofisiologi_orchitis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9339/3557/files/tuvemiroma.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/movusutiru.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/xilabofes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/nuzegudarotunugobosipado.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/77279429242.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/27015283345.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/recruitment_process_flowchart_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/jisewu.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
stream_005_off0000a7bb.bin
d9586d9b66d3f2a88f4feca4a4c8980d4e2850a8585debe2ddadd6a87937c821		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA7BB 21052 bytes
font_00_sfnt_off00007230.bin
b95409744846b7052e40d5fbff3b3528e6992de32a13c0a2616c71102df3c0c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 5148 bytes
font_01_sfnt_off00008393.bin
4681911dfd6f5bf678f52362a28b44b4ff504a2fa6e9322aa78aa513441b8b63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 10572 bytes

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