Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec5e61d79222d09…

MALICIOUS

PDF

36.1 KB Created: 2020-08-15 00:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a847e5715307a22aeb450686acb038af SHA-1: a5fb22fecb5938a2794f0fb9cd4e720166866760 SHA-256: cec5e61d79222d0939b3b0adfd578f5e15b90fe59a09c7d4543244e9cbf687dd
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=viva+video+apk+pro+apkpure'. This URL is presented within the document body, likely as a lure for the user to click. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, potentially for SEO manipulation or to host further malicious content. The ML classifier strongly flags 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=viva+video+apk+pro+apkpure
    • http://files.7seaswriting.com/uploads/1/3/1/4/131453208/fibopi-fonoveke-pibusaropu.pdf
    • http://files.jamesmatthewwilson.com/uploads/1/3/1/6/131637057/d1e23bb.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/bank_alfalah_orbit_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0438/1117/6610/files/barron_s_ielts_superpack.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/megojufovevisedibimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/guniwodotoso.pdf
    • https://cdn.shopify.com/s/files/1/0428/5097/5910/files/multivariate_data_analysis_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/5004/1495/files/54928293863.pdf
    • https://cdn.shopify.com/s/files/1/0428/2440/1063/files/fighter_5e.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/jokodavibosufajufar.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/industrial_automated_systems_instrumentation_and_motion_control.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/7544603731.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5130/files/laxijapisaraforuk.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_off000050fd.bin
43624d1a4709b5fe3630d4abafa260bfef658d89173c4e30aa8684ab7c3143ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50FD 4832 bytes
font_01_sfnt_off00006185.bin
36ea9588dee522d841c1d75ca48a04f376c4bfbde4c5e36ecee80a911e148f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6185 10000 bytes

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