Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad9898df581cb3d…

MALICIOUS

PDF

35.1 KB Created: 2020-09-02 01:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4929da2d3bd26c30fa5f7f33f2a6700 SHA-1: 01f013e3233b2c4ba72ee62d8eb28388d7bf18c0 SHA-256: dad9898df581cb3dc70f30cd0f82c5de72dfd1650e7028b70ee9dc7e14f7064b
154 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, containing numerous embedded links to external PDF files hosted on platforms like Shopify. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.cc/wix?keyword=panama+city+florida+pier+fishing+report.

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=panama+city+florida+pier+fishing+report
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/selenium_webdriver_java_api_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0432/4058/7431/files/zefejabajirupubur.pdf
    • https://cdn.shopify.com/s/files/1/0433/8548/7516/files/antenna_array_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/manual_fanuc_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/lowrance_hds_7_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53940500656.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0498/files/babukijexija.pdf
    • https://static.usrfiles.com/ugd/37428b_e22a1c09bbb849d3951172abe9028d41.pdf
    • https://static.usrfiles.com/ugd/3f80ec_8a68a329587d402c89a2cbcba011c45f.pdf
    • https://static.usrfiles.com/ugd/de60da_41d29e64d7fe4676a6875014deeb89a7.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_off00004b75.bin
9a376ebf57ab6d3bf5f44a104c6e31a5eb8e92729f625d2b46691449e54536fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B75 5672 bytes
font_01_sfnt_off00005ea5.bin
22932940a000826c14c240e2274981eca55b53f14cea73dc48f72ba39b33f995
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA5 9728 bytes