Malicious PDF — malware analysis report

Static analysis result for SHA-256 9caee572591f015d…

MALICIOUS

PDF

39.0 KB Created: 2020-07-25 13:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1793fdbe6c5f23e1675a2c7ffd257e SHA-1: f6461113705db57578288cf4fec202c65ca72cd4 SHA-256: 9caee572591f015d03358d4ef9007a79aaa94b4606528e263527f63948b29861
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content, but the presence of the redirector URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=idle+balls+mod+apk+2018
    • http://files.visionquestmusic.com/uploads/1/3/1/3/131380992/siraxobutiwel_diwapapur_defasi.pdf
    • http://files.beaskeys.com/uploads/1/3/0/7/130775850/087be6.pdf
    • http://files.amuseartfair.com/uploads/1/3/0/8/130873876/494422.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/83768561207.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/kozebop.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/57835362210.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/24604705091.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/77244398567.pdf
    • https://cdn.shopify.com/s/files/1/0440/8157/8136/files/71021892708.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/kasusamatewilo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8527/4024/files/zakumit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/21466590214.pdf
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/93481817990.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c23.bin
8fa06e7a278dad16fe74dce03b85e3841303afc255d615c70e9841b5fd93fba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C23 5224 bytes
font_01_sfnt_off00006dde.bin
751281868c264b59b1966e9212993680bc83f837f107b61ac8e8daef1f9ddca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 9752 bytes