Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ac6a83d346bafc…

MALICIOUS

PDF

41.0 KB Created: 2020-08-31 04:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba45cb043658a138058b7c02bdc2465b SHA-1: a7a7cf23f971b0a5b85b778acd97a11aea62262d SHA-256: d9ac6a83d346bafc75c172783086d5e62e17c104da39d82698c19ac0a6fa76b7
150 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/wix?keyword=pinocchio+ep+1+eng+sub+full+screen'. This URL is presented to the user under the guise of providing 'Pinocchio ep 1 eng sub full screen' content. The PDF also contains a large number of external links, many of which are benign, but the primary malicious link is clearly identified. No scripts were extracted, but the presence of the malicious redirector is sufficient to classify this as a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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 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/wix?keyword=pinocchio+ep+1+eng+sub+full+screen
    • https://static.usrfiles.com/ugd/b8c837_7aad1a7d4d234b7d821a4e902bbc6bbb.pdf
    • https://static.usrfiles.com/ugd/fa6f14_4ed4de1af1f14e08b89ec3e67055c4be.pdf
    • https://static.usrfiles.com/ugd/4dd980_dba33715557f41c0a63a380645aa66b5.pdf
    • https://static.usrfiles.com/ugd/362633_1de147ed48804e09b4a99f402443c3b4.pdf
    • https://cdn.shopify.com/s/files/1/0464/7246/2486/files/unreal_world_new_player_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/2632/4383/files/40_leons_pour_parler_portugais.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/refraction_of_light_at_curved_surfaces.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6389/files/certificate_of_project_completion_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/alphabet_arabe_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0439/4716/3806/files/31006217898.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3367/files/sewage_treatment_technologies.pdf
    • https://cdn.shopify.com/s/files/1/0438/9611/1259/files/16059256206.pdf
    • https://cdn.shopify.com/s/files/1/0431/1030/1847/files/62997427421.pdf
    • https://cdn.shopify.com/s/files/1/0434/1674/8188/files/dugedixujoluxux.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3876/files/grammar_test_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/85540529961.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_off000053fd.bin
4e935dfd5130ace0b5906c50b40f92f0277530b4af551b5aefba2e6453dcca14
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FD 3248 bytes
font_01_sfnt_off00005fd0.bin
39d77e9a37944f2f5117bb45d819acc83dd0e18cc0860449fdc72db002f168ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD0 5260 bytes
font_02_sfnt_off000071b6.bin
224b64b29efdb5a3a8bda43115fef2ad629227a363e073b4936ae24532972b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 11072 bytes