Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d95f06e8744c800…

MALICIOUS

PDF

125.9 KB Created: 2020-08-02 23:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 644b69d7102cb9fcda9441ad91586206 SHA-1: 4e675c595299d64d9c94d350e5d7e42717fa10b1 SHA-256: 9d95f06e8744c8008512c87367290d6bfe889a1ee66c2ccaa790bf50af076c2a
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'Yale forklift service manual pdf' and a URL that matches the redirector. This suggests the PDF is designed to trick users into clicking the malicious link, which then redirects to further malicious infrastructure. The presence of numerous SEO-linked PDFs hosted on Shopify further supports a link farm or SEO poisoning tactic.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.ru/pify?keyword=yale+forklift+service+manual+pdf
    • http://files.adielgrace.com/uploads/1/3/1/3/131398278/wijuvigegukawe.pdf
    • http://files.kokomozionumc.com/uploads/1/3/1/4/131407152/02a0f1.pdf
    • http://files.rutherglenlamaisonstarnaud.com/uploads/1/3/0/7/130775011/3484955.pdf
    • http://files.reignscleaningservice.com/uploads/1/3/0/7/130738984/7915248.pdf
    • http://files.cassidyboltontravels.com/uploads/1/3/1/3/131379801/2230001.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/gepelum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4872/9766/files/52369114387.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/wapov.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/butemifif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/zelowuvezijopiwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/bivaloxazonopik.pdf
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/memiwaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/29285366081.pdf
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/pamujekuburonazazegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/77024038193.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/97913333929.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/vumeluni.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/jepojolukaneliraki.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_off0001a40e.bin
adfaecdd3e2e7aad087125d7c879e08d7178defa2c550e8889d02468f18069ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A40E 5384 bytes
font_01_sfnt_off0001b657.bin
beb8f3495de602989d5955e178bde1815c963554b8b5a00f38f36f793da68bfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B657 16968 bytes