Malicious PDF — malware analysis report

Static analysis result for SHA-256 7737b1ad90a955de…

MALICIOUS

PDF

49.3 KB Created: 2020-09-07 11:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e3a2052cd25f3d7b262fcc03f2a02c9 SHA-1: 4caa44f60eb99a19ccacc52c8d9a1cd1338303a5 SHA-256: 7737b1ad90a955de0a7081c4af8bf639eb8f2a9276a7517d335424e080e31e51
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a weather report and a URL that aligns with the advance-fee scam lure identified by heuristics. The presence of a malicious redirector link strongly suggests an intent to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.link/wix?keyword=weather+report+chula+vista+california
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ce5d00_0c740287b7614637a34f41e83c1933ff.pdf
    • https://static.usrfiles.com/ugd/0c4177_01cfab1952164a62ad645ee781ac38f7.pdf
    • https://static.usrfiles.com/ugd/badafb_bbbabb4c1d924259818c6dbca6daff07.pdf
    • https://static.usrfiles.com/ugd/6cf392_d4b424d5a9eb43aca96d4609863846c7.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/jalanaxob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/18590666408.pdf
    • https://static.usrfiles.com/ugd/bae0a0_a435ec031de4455b8f3cde1e1ce44ddf.pdf
    • https://static.usrfiles.com/ugd/cac9e4_7c65c8bd4a4040ea8f5e767b0283c9a1.pdf
    • https://static.usrfiles.com/ugd/b8c837_153ecf9950d243c89120531898891fff.pdf
    • https://static.usrfiles.com/ugd/e745be_534d22455af24a019617d24c0a50aa13.pdf
    • https://static.usrfiles.com/ugd/8ade13_8a895ad1170142ba8e1439bdbf0f66f3.pdf
    • https://static.usrfiles.com/ugd/21e6f2_7a0bba48973a4bfca07441446e429594.pdf
    • https://static.usrfiles.com/ugd/f65175_358a559d53da44cd92e8295aed59f6bd.pdf
    • https://static.usrfiles.com/ugd/2ac701_0614f9760ec6489e93b553786583cc30.pdf
    • https://static.usrfiles.com/ugd/b8c837_04040f7608d74a0495fb67801fd37b0b.pdf
    • https://static.usrfiles.com/ugd/4d548e_6aad8788d90142e1b55051aca9cd8162.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000834e.bin
75d511513000758798d86100b87b113c1c63efeccb7cac2b49e2e3b3b644ecfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834E 5176 bytes
font_01_sfnt_off000094fa.bin
dfe9dd05ab6a378817deac2bcb40e713d8f1bfb969424b0106fe555f29e1fb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FA 10192 bytes

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