Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9a76a84defacdc…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 12:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: addde459467edccc05a8fa2daec30f6b SHA-1: cb0f7eba1c24c48fc487163f328d6308186563b5 SHA-256: ce9a76a84defacdc88eb437414f60635efa7b1846c7b9e4f39bfd518dcae3037
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely part of a phishing campaign. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a file conversion service. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=c%25C3%25A1ch+chuy%25E1%25BB%2583n+file+%25E1%25BA%25A3nh+sang+pdf+tr%25C3%25AAn+%25C4%2591i%25E1%25BB%2587n+tho%25E1%25BA%25A1i
    • http://texemim.dtsaartwalk.org/uploads/1/3/0/9/130969368/gojililefo_sopixegapegepax_lufokavig_nolaxoxoxumopo.pdf
    • http://files.hisgathering.net/uploads/1/3/1/4/131406173/54baa.pdf
    • http://files.purpleheartsnorthcarolina.com/uploads/1/3/0/9/130969498/vomeduma_vabadunagisugor.pdf
    • http://files.luvmymasseuse.com/uploads/1/3/2/6/132681456/mubuwikas-xizufa-supolus.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/rexijobozuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5969/8077/files/lonavixojulopitumumex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/73130288260.pdf
    • https://cdn.shopify.com/s/files/1/0434/0973/5845/files/kanozufovifesu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6792/4899/files/barashada_carabiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/luwokikapinolaravopako.pdf
    • https://cdn.shopify.com/s/files/1/0431/9055/0679/files/rebeliones_rurales_pronunciamientos_leva_y_bandolerismo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/niwitidebifikul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/dolawufajo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000575d.bin
3cd5cb72cf0bdadd37d781c87be4de81cc487522308190e84192ab0fb8500971
pdf-font-stream PDF embedded font (sfnt) at offset 0x575D 6832 bytes
font_01_sfnt_off00006bd3.bin
c598bad92275d2152306ebf825a760bc82c680fc044261e0913790963671abb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD3 21092 bytes
font_02_sfnt_off00009a4b.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4B 4324 bytes