Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f6b3378740cfa6…

MALICIOUS

PDF

64.1 KB Created: 2020-09-01 20:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 99848d65f4add6ecefe930241cae96ca SHA-1: b741a93f30b2d6604b242620664b5c9439f9f8e4 SHA-256: 83f6b3378740cfa6b33b7736f3e939a632f2499ab1a8d4c9f60323595b7d7f7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and a reference to a report, suggesting a social engineering lure. The presence of numerous external PDF links, many pointing to seemingly benign content, indicates a link farm strategy, potentially to improve SEO for the malicious redirector.

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.com/wix?keyword=attendance+management+program+report In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static.usrfiles.com/ugd/9d869b_c319a5c446c84c51836286444980be1a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2b20d45d18b94ade923c547aeb79234d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ceeb9_78f0f86fbe9d432888b3157bf30f502b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a1fb72_9c37f625e6c44b2a89f16640176e83dc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_68c779775dc84d89981327673fac6f1a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_870e0e68e57640e58ff529effbee9e36.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/98e298_cfd796a3bdd34d37afbf626beb0c78b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e78b77_63264257ff4645938816f433da6dd624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/pregnancy_week_by_week_by_storknet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/99063209678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/62106485904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7199/5033/files/21265992895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/vuxikarijoxoxojatasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/41189547750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5856/1173/files/magneto_abrasive_flow_machining.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BE3 2880 bytes
SHA-256: aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344
font_01_sfnt_off0000a621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA621 5172 bytes
SHA-256: 078589e534ac60c3a733cba927362ee023b9f83eba2307dea5fab057615fe27e
font_02_sfnt_off0000b797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB797 8440 bytes
SHA-256: 598d6f584cf593c3fb6f48fad8aa77d5b22c57b8a08a122e533c354f5a0a0b19
font_03_sfnt_off0000ceb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB8 10020 bytes
SHA-256: c69ed1f54e6f9f18f93c9ad67fb8c4a5e3dbaa1d76160f888031704fa65c18b7

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