Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab947c606a231c53…

MALICIOUS

PDF

41.2 KB Created: 2020-08-23 05:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e90f7bf578d0bed9dcefe3748532287 SHA-1: 3c261ab32075c32e0bd51a78d2fa698704c03439 SHA-256: ab947c606a231c53726906186d09e7561ecff35c853096ecfa0500e5899caaf4
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. One critical heuristic identified a malicious redirector link, `https://ttraff.cc/pify?keyword=github+license+guide`, which is presented to the user as a 'Github license guide'. This suggests a phishing or scam attempt to redirect users to malicious content. No scripts were extracted from this sample.

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=github+license+guide
    • http://files.kiarakzelcreations.com/uploads/1/3/1/4/131406841/a19ce3.pdf
    • https://cdn.shopify.com/s/files/1/0435/5591/3879/files/bam_bam_song_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1529/files/wupiberodow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9629/files/funny_easy_brain_teasers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/3761/4499/files/dotowepam.pdf
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/kizugobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/vazejumopavasup.pdf
    • https://cdn.shopify.com/s/files/1/0440/3711/1973/files/51643987003.pdf
    • https://cdn.shopify.com/s/files/1/0431/9087/8372/files/xowon.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_off000062a6.bin
233c92a72054798ac13278ad9cc076fdb6ede86da895d38245437d2cfd2cb4a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 5064 bytes
font_01_sfnt_off000073d8.bin
89bbc373c73bd205f4cc834af9ee98e0cc2b7f9026ae26f2e7165c5f1a23b907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D8 10724 bytes

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