Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca529f3c7b08b2e…

MALICIOUS

PDF

50.3 KB Created: 2020-08-12 14:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b307be88d06d39d647228ac0af3f0ca6 SHA-1: 9196495bf0cff1a8f521064653251ac62eb39be6 SHA-256: 9ca529f3c7b08b2eb160720596681c1b8cd776d33097c798d9e950be0bd19277
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, disguised as a download for educational material. The primary malicious link is https://ttraff.cc/pify?keyword=11th+zoology+book+in+tamil+medium+pdf+download, which likely leads to further malicious content. The presence of numerous links to PDFs hosted on Shopify, while some are benign, suggests a tactic to obscure the malicious redirector within a larger set of links.

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.cc/pify?keyword=11th+zoology+book+in+tamil+medium+pdf+download
    • http://files.smbdigitalista.events/uploads/1/3/1/3/131379266/sesulixifoba_malekejalosix.pdf
    • http://kobez.grantvolleyball.com/uploads/1/3/1/6/131636789/votiju-xifejuzido-veforimumuwisit-zutabinele.pdf
    • http://dofad.innisfailprorodeo.com/uploads/1/3/0/7/130775448/vadojikogo_mukoxav_runozax_xegesixuluno.pdf
    • http://files.malfinisproductions.com/uploads/1/3/2/6/132681725/1144349.pdf
    • http://files.ablegardenmaintenance.co.uk/uploads/1/3/0/7/130775309/ratolofineponufik.pdf
    • https://cdn.shopify.com/s/files/1/0432/5077/8269/files/ford_f150_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/0273/9362/files/kodowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/1430130185.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/legoredenutosovafifez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9776/7592/files/vedomopofopomej.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0398/files/the_atoms_family_atomic_math_challenge_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/best_wrinkle_cream_oprah.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.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_off00006624.bin
a2d029d06f8907a7e1d27e25f733fa21bcf100c95534a43fd000c8530241c313
pdf-font-stream PDF embedded font (sfnt) at offset 0x6624 5584 bytes
font_01_sfnt_off00007922.bin
559e63e099dbf0f48d0e88bb67fdbd8f0dc6526c6c9f09b9f455e7396803f8f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 12844 bytes
font_02_sfnt_off0000986b.bin
b4089a94f35d8f852b075cb5b76c48d9b922f7d7c5d18c014ce267d2ac92ac33
pdf-font-stream PDF embedded font (sfnt) at offset 0x986B 10296 bytes