Malicious PDF — malware analysis report

Static analysis result for SHA-256 907538c55b16fc06…

MALICIOUS

PDF

40.4 KB Created: 2020-08-17 02:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9035ded44c988807389a431ce720d9e SHA-1: 2c4fbb5633f1ea67ea815cc93d2c1fd4d70de692 SHA-256: 907538c55b16fc065ea9a5b43307e83149349de456a5d8e19502a912949879de
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL associated with a "beach buggy racing hack mod" lure. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or content distribution network being leveraged for malicious purposes. The ML classifier strongly flagged this PDF as malicious.

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=beach+buggy+racing+hack+mod
    • http://files.octopushairdressing.co.uk/uploads/1/3/0/8/130874457/jivunula.pdf
    • http://gitixurug.santafefilmsguide.com/uploads/1/3/1/4/131454696/doxoz_gufanomabexuful.pdf
    • http://tolos.artimage.co.uk/uploads/1/3/1/6/131606490/jevasasuv-dobutifap.pdf
    • http://zonijaxi.redbloomyoga.com/uploads/1/3/1/0/131070847/wotafanadopugibo.pdf
    • http://files.falmouthfloodinsurance.com/uploads/1/3/1/1/131163599/7547985.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/27388422459.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2303/files/dell_poweredge_r740xd_specs.pdf
    • https://cdn.shopify.com/s/files/1/0440/1269/9798/files/segmentos_de_la_arteria_carotida_interna.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/6323317842.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/aleister_crowley_de_arte_magica.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1319/files/10657647553.pdf
    • https://cdn.shopify.com/s/files/1/0452/8957/0466/files/windows_7_bootable_iso_file_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4163/files/lefixomululinegidot.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/93723448230.pdf
    • https://cdn.shopify.com/s/files/1/0441/1860/5976/files/aerobic_sewage_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/78860705551.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_off00005f72.bin
1bca3e18ffb9084cec988964e6d3885268efb7742f12f280579353c52c521698
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F72 5500 bytes
font_01_sfnt_off000071fe.bin
1e18d855fd3b7f4becb1320c8cfcdbe6f87e6067c86aba997f8948d3af07960e
pdf-font-stream PDF embedded font (sfnt) at offset 0x71FE 10216 bytes