Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7278b402472311e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-04 01:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4d4203697567ad5fbeb22de3e5767e8 SHA-1: d0d42193343e8679dc70cc4c7c6a6b244349e95d SHA-256: a7278b402472311eddde319bc309ef380f3aebad502a52e6b25fa09c5f1a769a
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 large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.cc/pify?keyword=adapted+physical+education+and+sport+pdf, which likely serves as a redirector to a malicious destination. The document body contains garbled 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.cc/pify?keyword=adapted+physical+education+and+sport+pdf
    • http://files.perhamxc.com/uploads/1/3/1/8/131860787/3774810.pdf
    • http://files.pittsburghfisherhouse.org/uploads/1/3/0/7/130738993/powowovinevedelufov.pdf
    • http://files.therulesbooks.com/uploads/1/3/2/8/132815924/8889e7db04803.pdf
    • http://files.smr115.com/uploads/1/3/1/6/131606111/vatalemobaka-rolemebenodalo-wegopugap.pdf
    • http://files.amsetcen.com/uploads/1/3/0/9/130969061/jevijizunol-junapavamego.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5704/files/95201917801.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/vinoluvabur.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/9622065904.pdf
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/1869565131.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/voxibozojudasukuzojetirab.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/37790864166.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sobobubujuwin.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/61417577201.pdf
    • https://cdn.shopify.com/s/files/1/0433/3653/2136/files/kerekotusologapupulut.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/97208168716.pdf
    • https://cdn.shopify.com/s/files/1/0432/8764/2267/files/wonikobixiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tikifulodu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/50151939149.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_off000065a9.bin
4531c1811c5d537aa2fb63270ad6e14da4b8b5ea03477b040d09cfb0b27d3202
pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5336 bytes
font_01_sfnt_off000077d2.bin
5514a462dc6c995a7ef0d43daea95e58d53f54db62cf2931204d999c3bbeb406
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D2 10428 bytes