Malicious PDF — malware analysis report

Static analysis result for SHA-256 5064860ef57c9ba4…

MALICIOUS

PDF

48.8 KB Created: 2020-08-06 16:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a604cac483d488c6b5342df2ecf2a2b SHA-1: 6f60964961f1c1e784e665825144fdd531b9b5c4 SHA-256: 5064860ef57c9ba484618624a885471d1642a35b90ab4e1d7d53a2ddc984e4ed
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body also contains this URL, disguised as a free download for an English grammar book. This indicates a social engineering lure to redirect users to potentially harmful content. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates.

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.com/pify?keyword=understanding+and+using+english+grammar+5th+edition+free+download+pdf
    • http://files.brookeastonsings.com/uploads/1/3/0/8/130873758/nixoja-kuvenateguzin-guxiludabupulo-tidetuboremoxa.pdf
    • http://files.jonancarr.com/uploads/1/3/0/8/130813409/loramuwi_kovubikute_putemujaratej.pdf
    • http://todigabog.otvfc.com/uploads/1/3/2/6/132695663/teregozikusufopu.pdf
    • http://files.anniescandy.com/uploads/1/3/1/4/131437427/gejulomuwapibufavik.pdf
    • http://files.showtimetheatrecompany.com/uploads/1/3/1/0/131069899/c1511c884df7f0.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/bamewopafobuwobujiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/madadajufiwezufawowid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5901/files/kewujanimufopan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/63564183787.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/53139400619.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/lapirimujadotelimopuki.pdf
    • https://cdn.shopify.com/s/files/1/0437/3390/9665/files/zojurozebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7110/files/vigajedogaxe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/advantages_and_disadvantages_of_islamic_banking.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/jogumena.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/848298065.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_off0000760d.bin
bd30b20d7358afa09f140c5c2dd0d263cc7025197dd5b7d59cb0811f90999a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 5664 bytes
font_01_sfnt_off0000893e.bin
f3c0f9d465de8a59abd812cc43d616fe89134a4fc820fb048629cbe8daad4c62
pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 14548 bytes