Malicious PDF — malware analysis report

Static analysis result for SHA-256 53a5ef4e22c5b47c…

MALICIOUS

PDF

38.3 KB Created: 2020-08-20 05:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8071eb38d8be242832619625d10d16 SHA-1: c51be4ae1cf61dd16dacd6e26ee5ff8192182bee SHA-256: 53a5ef4e22c5b47c62a48f673018cbdb808ab9e4056d37f76d5c9b8010b331ff
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs. The presence of a 'download button' lure further supports the attack pattern. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=building+planning+and+drawing+lab+manual+pdf
    • http://disirub.foothillsmeats.com/uploads/1/3/0/8/130874493/sawitunufu_wimulo_bewak.pdf
    • http://fosekaxem.dixborovillagegreen.org/uploads/1/3/2/7/132740494/kukitida-jojukesuxib.pdf
    • http://files.hacobian.org/uploads/1/3/1/1/131164386/mefesikexopavanevimi.pdf
    • http://kilez.my-gama.com/uploads/1/3/1/4/131437549/mutosaz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/tevanujofixosobijopafur.pdf
    • https://cdn.shopify.com/s/files/1/0454/8037/8518/files/wevut.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/sufifuvapoxitusuxezis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/fijikasewok.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/net_framework_v4_0._3019_offline.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/anemias_nutricionales_en_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/sitigavevazazozogawifelo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/rupuwejetuxud.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_off00005823.bin
e5d62cda68e4acfc5e2cb078279f65532238c2f5956e108952fde234e7e9be8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5823 5464 bytes
font_01_sfnt_off00006aac.bin
22f36a68791da38bf583b3f3b7301f73571c0af385f3c3c69c0753607515cf7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAC 9792 bytes

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