Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad13d6ec3349ad2f…

MALICIOUS

PDF

54.1 KB Created: 2020-08-14 22:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b4a24d112c00235b616089d9bee25ce SHA-1: a1247ea49e0f4ef5cfbdac431fe0f969ed478720 SHA-256: ad13d6ec3349ad2f16b5b8a8ed8a1136584c6654be02d4dd544e12932019d810
160 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, pointing to 'https://ttraff.com/pify?keyword=igi+1+directx++for+android+apk'. This URL is presented within the document body, disguised as a software download. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this PDF might be part of a multi-stage attack, potentially requiring a password to decrypt a subsequent payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=igi+1+directx++for+android+apk
    • http://files.workinnvision.com/uploads/1/3/1/3/131384018/zudemesenodevakani.pdf
    • http://files.losososfitness.com/uploads/1/3/1/6/131606630/694400.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/siximezolulexuvefosed.pdf
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/91494684097.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/karemoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/botivuxijowom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/96916196687.pdf
    • https://cdn.shopify.com/s/files/1/0437/3390/9665/files/kasadelisunofuladosariraf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/zalipurub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/japitini.pdf
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/bransford_and_johnson_1972.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
stream_005_off0000a2bf.bin
b10551c9a655009d0529cc0d420b6f1bddf16a3b7f80f1a8ce1a3edc6cb61c4a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA2BF 23288 bytes
font_00_sfnt_off00006e09.bin
073011c3342829a3f4435f5e3611119e0e3f770c5365f7018cb262d087a8b262
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5236 bytes
font_01_sfnt_off00007ff2.bin
53a21fe6bdd2f97aeb37b78e7e33000359eb6a59eaec60bde0015fa3d2783ed5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF2 10080 bytes