Malicious PDF — malware analysis report

Static analysis result for SHA-256 02da4037eafacd9e…

MALICIOUS

PDF

34.9 KB Created: 2020-08-18 16:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c85ebe03347dfe24cc3ddfad1f65c3 SHA-1: f16c89ed0625b5741cb9ba456e823d7f3c8f343c SHA-256: 02da4037eafacd9e3723d947a234d82ebe7d019d4e1638efbcc1a6585be25e33
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for a 'bar stool cad block'. The link, 'https://ttraff.cc/pify?keyword=bar+stool+cad+block', leads to known malicious infrastructure. The document also contains a large number of links to other PDFs, likely for SEO manipulation or to obscure the malicious intent. No scripts were extracted, but the presence of a malicious redirector and the lure suggest a phishing or scam attempt.

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.cc/pify?keyword=bar+stool+cad+block
    • http://files.marycatherinestarr.com/uploads/1/3/0/8/130874400/3025642.pdf
    • http://files.negativetopositivefilms.com/uploads/1/3/0/7/130776460/ligenopem.pdf
    • http://files.laracuisine.com/uploads/1/3/1/8/131856772/8310430.pdf
    • http://files.scripturesdramatized.com/uploads/1/3/1/4/131438142/gijumivaw.pdf
    • http://dakod.arcofspringbranch.com/uploads/1/3/2/6/132695278/5079962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/genestealer_cult_codex_8th.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/bamudijiwisene.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/202153064.pdf
    • https://cdn.shopify.com/s/files/1/0431/1167/8114/files/53400375954.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/povamemigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/muxefanuro.pdf
    • https://cdn.shopify.com/s/files/1/0447/4375/3879/files/midute.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0924/files/marupanib.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/8041231621.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/zerijoxegapibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/forbidden_woods_map_bloodborne.pdf
    • https://cdn.shopify.com/s/files/1/0438/7841/6539/files/opt_in_monster.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/21133186587.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_off00004b5d.bin
43c6e573a09b9af8525bac9fbace953f5e64550bfc3da23b1c8449b0d47a2e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5D 5188 bytes
font_01_sfnt_off00005d07.bin
bd34c8606e65bed3f1fd0ab08fd7a91e2b767bfe518b73ffd2b695959700ee1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D07 9920 bytes

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