Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8bc7ff6b5b85a6…

MALICIOUS

PDF

55.7 KB Created: 2020-08-04 15:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a99bebd9ff4a8710a46e0ad6777e8f2f SHA-1: cbb42583205bc385514d27c8043172abdc442ff3 SHA-256: bd8bc7ff6b5b85a6e04032e44627b35ea9f577346ba0ee4ccb7ea77931afc92f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=que+es+el+neoliberalismo+libros+pdf'. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The PDF also contains a large number of embedded external links, flagged as a PDF link farm, further indicating 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=que+es+el+neoliberalismo+libros+pdf
    • http://nenuki.elliottmilesmckinley.com/uploads/1/3/0/9/130969656/3176916.pdf
    • http://files.infantswimphilly.com/uploads/1/3/2/6/132695352/979480.pdf
    • http://files.jjjohnsonauthor.com/uploads/1/3/1/4/131437268/lotoxaboxubuw.pdf
    • http://files.ashleyeglennon.com/uploads/1/3/2/8/132814084/piradowepupixik-ditulizu-nurutako-rusemewudar.pdf
    • http://nenuki.elliottmilesmckinley.com/uploads/1/3/0/
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/38735191057.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/kukasomagiwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/53700587003.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/gepiwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/malayalam_calendar_2020_manorama.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/616683152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/nevinapedugurel.pdf
    • https://cdn.shopify.com/s/files/1/0430/7356/8919/files/87089976258.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_off00009714.bin
59f1e0fd9910636b05758b2e0fac1439045394f19258cc5ddb02d3a84b33f29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9714 5388 bytes
font_01_sfnt_off0000a942.bin
6ac2a15fab4aaf4ed784c0612ef766f257eccea115cc4b9c3ab1dbe3e0e621fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA942 11864 bytes

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