Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30139228b7dbf7e…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 10:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d535d83b7fde80a237a0f048981a6282 SHA-1: 2e1bb10bd2e7713e1505dab93bcaf2e101457877 SHA-256: b30139228b7dbf7e3432d525032837642c9c3e6e3671aaf3584e1edbc4fd8eba
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=paradigm+pdr10+subwoofer, which is also listed as a malicious redirector. Additionally, the PDF contains a mass external link farm, with the first URL pointing to a benign Shopify domain. The primary attack vector appears to be a malicious link embedded within the document.

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=paradigm+pdr10+subwoofer
    • https://cdn.shopify.com/s/files/1/0463/1147/3309/files/the_healthiest_diet_on_the_planet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/30859871697.pdf
    • https://cdn.shopify.com/s/files/1/0438/3087/0173/files/72226904093.pdf
    • https://static.usrfiles.com/ugd/fd7405_0827a95fa43b482eb0022ab81009cc54.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/adding_philippine_money_worksheets_for_grade_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/24181718791.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/fadonatane.pdf
    • https://cdn.shopify.com/s/files/1/0460/1351/3889/files/91007958746.pdf
    • https://cdn.shopify.com/s/files/1/0428/0057/8723/files/pathfinder_carrion_crown_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_2986a01e740a42bebdd0852c6651dd67.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2acc598fac46029e4a7365f27b633d.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_off0000524e.bin
0e3eca1f2e70ad41c1a010720caf84085c3a47b1b0b5d5a5fcc2ec1c84c82323
pdf-font-stream PDF embedded font (sfnt) at offset 0x524E 5452 bytes
font_01_sfnt_off000064e5.bin
adf029da328fb6e5d4f38e4a8f11656e0e0a06cfba16a29a9d810b5ea36c8f10
pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5 16184 bytes
font_02_sfnt_off00009530.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9530 4324 bytes