Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceb45d1b93b04b5…

MALICIOUS

PDF

47.1 KB Created: 2020-07-30 02:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47dd925aadfd2ab1b214521f3a046ff8 SHA-1: fdf701d98f807ca9c5e1dd682ed479ba5997d039 SHA-256: 4ceb45d1b93b04b59038fc4747a6e4b97e55ebe3e0544472ec7ef13375bc5323
120 Risk Score

Malware Insights

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

The PDF contains a mass external PDF link farm, with multiple links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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.cc/pify?keyword=olla+alimentaria+de+guatemala+pdf
    • http://files.destockmarket.org/uploads/1/3/2/7/132712235/gajubonutu_guget_xifogufab.pdf
    • http://files.dameliart.com/uploads/1/3/2/8/132814415/zuxalisesazof_jevuxoluj_wakojuzojemuror_muxibufimokoma.pdf
    • http://files.makefunoflife.net/uploads/1/3/1/3/131381021/ganuto.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/vakizajidibipume.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/98511306477.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/punidadopib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1454/3771/files/javoxowowelofadixuwoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sutapazuvonovojikujabera.pdf
    • https://cdn.shopify.com/s/files/1/0428/3927/7734/files/luxonikokuvurafofavaxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/80896872024.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/83047344205.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/feviwoxikagigureg.pdf
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/22005541892.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/penisisujokitavubovi.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/soraximeliwesebaxujawe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5658/5121/files/9017202512.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/xaxozil.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/mebati.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_off000079b6.bin
fc83410bb1dfa65046e43bb9fb0aaa70ada80bd599f4e9e446291c4c923c297a
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B6 4984 bytes
font_01_sfnt_off00008a8d.bin
6d95908083dd71eaf45613ed47a8275033406f28a7feb73d2709f32bcbe8ae69
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A8D 10620 bytes