Malicious PDF — malware analysis report

Static analysis result for SHA-256 319d14e7cb55f4d8…

MALICIOUS

PDF

59.6 KB Created: 2020-08-22 04:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0756ce1842b30addb4f54a40bc259752 SHA-1: b95aa7f6545759f841d255f97799cf5e1875078f SHA-256: 319d14e7cb55f4d857608d5a1c9f310c0da53f664885334b2d28e3ade07b6099
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=amoeba+sisters+characteristics+of+life+worksheet+answers'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the PDF is intended to trick users into believing they need a password for an archive, likely to bypass security scanning.

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.cc/pify?keyword=amoeba+sisters+characteristics+of+life+worksheet+answers
    • http://tuvepafeb.absohome.net/uploads/1/3/1/4/131483167/3657348.pdf
    • http://files.crinancanalcottage.com/uploads/1/3/1/3/131380354/fd3493.pdf
    • http://files.tanawanhandycraft.com/uploads/1/3/0/7/130775554/f8a701d.pdf
    • http://mesipe.toganolasnackcompany.com/uploads/1/3/1/3/131384575/5539424.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2190/files/plural_of_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7670/5692/files/82979888515.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/95685110986.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/wifosalozojewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4876/2529/files/samsung_mobile_warranty_card_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/xetejufifusixe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/rugalajebir.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/main_causes_of_unemployment.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/66418543312.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7619/files/movenetofabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/fozuvedilasezomiwadipu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7427/3948/files/80221977249.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_off0000a232.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA232 2828 bytes
font_01_sfnt_off0000ac2c.bin
f466a0a17da3420a0da6ebef0ec560f07c914ebb6b5a70645e137adeeedc50c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2C 5404 bytes
font_02_sfnt_off0000be79.bin
981e743a453e562fcdd89e8b611d9b9ad4a278123883561ea60e2e70e8cefbcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE79 9868 bytes