Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93fe9938838e231…

MALICIOUS

PDF

42.6 KB Created: 2020-08-06 12:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb3488d104ef7e4967df3ed322ee12ba SHA-1: f9ec58282d2cf40a1eb691daf1f546a9a230e4b6 SHA-256: f93fe9938838e23134ccf55c5affd10f98e306562689cc96fffe4b3045095b23
130 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external sites. One critical heuristic identified a link to a known malicious redirector, and another flagged the document as a link farm. The presence of a visual download button lure further supports the malicious intent. The document body itself is heavily obfuscated and contains a URL that appears to be part of the link farm.

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.ru/pify?keyword=catholicism+series+study+guide+pdf
    • http://files.anahatahealing.net/uploads/1/3/0/7/130739379/delovumita-zawutokok-ravekef.pdf
    • http://files.pippaspilatesstretch.com/uploads/1/3/2/8/132814241/rebiwogafamujoba.pdf
    • http://files.jrticulinary.com/uploads/1/3/0/7/130738755/roxizopejakep.pdf
    • http://pesuw.thoroughbredheritagehorseshow.com/uploads/1/3/0/7/130776257/7ac76d20287b0.pdf
    • http://files.carolynfine.com/uploads/1/3/0/7/130775727/b1b98d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16949815227.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/35505027482.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/94147061314.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/revivafosaxaxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/59343650911.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/zijojijozevozirekomorum.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4347/files/76230548902.pdf
    • https://cdn.shopify.com/s/files/1/0431/1479/1068/files/fupopopaboboriwijaduxeno.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/sagefewupopat.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/3837522233.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9037/files/jovoxovisarosubasawixokip.pdf
    • https://cdn.shopify.com/s/files/1/0429/4819/8556/files/xasijulimolalotodujibev.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/luxuworazud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/kapekawefabilaweroxumaki.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/
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/kapekawefa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655f.bin
6da81a15b169235980538bc6eb074b47fac31dfa34e39e3698da32e268a939ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x655F 5576 bytes
font_01_sfnt_off00007833.bin
4b0969864a72cf922dfe6500e8f9a0c4d5d45598bdfbbde848e71406f2832e00
pdf-font-stream PDF embedded font (sfnt) at offset 0x7833 10540 bytes