Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee9740779be6da8…

MALICIOUS

PDF

36.0 KB Created: 2020-08-30 03:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de80f4ff7ed6e361cfcbf7980d085dba SHA-1: fa11561256db5b568ecf8e8e230b510643c37841 SHA-256: 1ee9740779be6da8dde7895a75798a372b3841d88e215bb35025e896cbc73329
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristic. This suggests the primary intent is to lure the user to a malicious site, likely for further exploitation or credential harvesting.

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/wix?keyword=qui+es-+tu+roi+d%2527+humilit%25C3%25A9+paroles
    • https://static.usrfiles.com/ugd/8d0191_d9489712fd864467a087bd9b147199b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5721da99c474acd9b377d6813ebcd16.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dcce9e24629473e9e374a9c32e7160e.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/50340899024.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1317/files/bexadavuluwamixotapefug.pdf
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/fituzekimafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/jotojojolitiwoposibakum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4506/0762/files/subaru_ej25_engine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/niv_bible_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/archer_c20_manual.pdf
    • https://static.usrfiles.com/ugd/de65f7_238ff96eccf14f00bf10c035057a73fd.pdf
    • https://static.usrfiles.com/ugd/9219f8_058a3b7b1cfc418dbfdab5a53805d067.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_off00004a06.bin
380bb72e2af39b972677af8a3867ccebbc88aea166c814337dcf2f745ccad225
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A06 5468 bytes
font_01_sfnt_off00005c39.bin
335347ff5febd81e23abce293cd21f15ba5a16e92a7ee47b1ecd3a6aa7922b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C39 11856 bytes