Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc411d97d131e70…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 19:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcd48346d722f4e1368ebfce115baa8b SHA-1: 41d1426ddc1b7be3fed5c73720222417b368eb3e SHA-256: efc411d97d131e706140faf8e9f6cce45b969e5ae7c90949f7f1e22e715e5cf9
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 malicious redirector links and a link farm. The embedded document body text, though heavily obfuscated, contains references to 'Fallout3 strategy guide' and URLs, reinforcing the lure. The primary malicious IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

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=fallout3+strategy+guide
    • http://files.redolivestudios.com/uploads/1/3/2/7/132740277/7342845.pdf
    • http://files.dynamogymclub.ca/uploads/1/3/2/6/132681438/8865776.pdf
    • http://files.gabriela.is/uploads/1/3/1/4/131453574/newekidijuxewum.pdf
    • http://files.joseandresgiron.com/uploads/1/3/0/7/130775633/fusemunexunowe_bososulitiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/dufito.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/gekoderos.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/uverse_channel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/74720981001.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/rifujumetif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/sofukosurezarolesusex.pdf
    • https://cdn.shopify.com/s/files/1/0432/1057/1940/files/sojobukilofamotoxelo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3837/4050/files/sony_ericsson_w580_i.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/6908114476.pdf
    • https://cdn.shopify.com/s/files/1/0432/1977/9742/files/94340493981.pdf
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/doodle_god_cheats_artifacts.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/nirumalinoresumuvapijari.pdf
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/wenam.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_off00006ddd.bin
e661baf848289aee3e8daf273d43b955fec08adb6750ad8041eda126294ea590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDD 5216 bytes
font_01_sfnt_off00007faf.bin
4d3ab9c8136d9d895b0b072eb0230cdb19f0bab66565e06abd4bccdeddbc1ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAF 10308 bytes

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