Malicious PDF — malware analysis report

Static analysis result for SHA-256 719606562116687f…

MALICIOUS

PDF

53.9 KB Created: 2020-07-29 00:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae79cdd9714835f85953d4707441314 SHA-1: ae674c71cd959451a8511e1058ddb101b73063aa SHA-256: 719606562116687f96ca46172a305ab23ae94c353bfa350ae1f090c97a521aa1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a tutorial for 'powerpivot excel 2016 pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document is part of a link farm designed to distribute malicious content. While no scripts were extracted, the presence of a malicious redirector URL strongly suggests a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=tutorial+powerpivot+excel+2016+pdf
    • http://files.pitabilities.com/uploads/1/3/0/9/130969313/5206329.pdf
    • http://files.legendarypg.com/uploads/1/3/1/1/131164118/1378340.pdf
    • http://files.journey-to-alaska-adventures.com/uploads/1/3/0/9/130969772/neladozubivinevedaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/dinelunokinulibo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4250/3832/files/97410925835.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/26027800499.pdf
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/53981972865.pdf
    • https://cdn.shopify.com/s/files/1/0431/5388/3293/files/41562486035.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/tilotekeme.pdf
    • https://cdn.shopify.com/s/files/1/0438/8506/8456/files/72020353425.pdf
    • https://cdn.shopify.com/s/files/1/0437/0635/1771/files/fofenavafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/0113/4747/files/lunapopuluku.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/66625979252.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/defulezenajuwokapeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/41068748006.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/69858171862.pdf
    • https://cdn.shopify.com/s/files/1/0428/9203/4211/files/tamonamigevorafib.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000090a7.bin
7ad612b7ea1efabc0e4c5d1ad768b75a5980ee4f1eefe336afc7830b09398e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90A7 5396 bytes
font_01_sfnt_off0000a337.bin
8e48ea11cdcac9765179c51899dda290645ebd4e71640be78d8c69865fbf322c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA337 12076 bytes

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