Malicious PDF — malware analysis report

Static analysis result for SHA-256 04995cd43fc81962…

MALICIOUS

PDF

47.7 KB Created: 2020-08-10 03:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56a4d04b0b9dc943ae1c1c8821cbfaae SHA-1: 61e0c37f7efc54b7fcaec041b496b93be3a0e3e3 SHA-256: 04995cd43fc819626cdd706e21f9326fe4a60453126d8c109e2ab3d34f9ba983
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a search result for a specific PDF. It also exhibits characteristics of a link farm, embedding numerous external links, many pointing to Shopify-hosted PDFs. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic to malicious or SEO-spam content, likely as a lure for further malicious activity.

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/pify?keyword=bayley+scales+of+infant+development+pdf+free
    • http://files.herblowe.com/uploads/1/3/1/8/131871585/vaganomelogi-rofuda-lonaloruda-gugewareletax.pdf
    • http://tupipa.healthlinc.org/uploads/1/3/1/3/131379578/zexavabe-pibasexuk-mujumodap-wazujuwadusi.pdf
    • http://kawudaxi.wintechfrance.com/uploads/1/3/1/4/131438464/dijigagero_kenezazebisit_jefezuwujoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/79783369191.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/xewunikesozow.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/arquitectura_latinoamericana_contemporanea.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/71057403907.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/niedermeyer_s_electroencephalography.pdf
    • https://cdn.shopify.com/s/files/1/0438/4066/7798/files/kaliwofaruzoda.pdf
    • https://cdn.shopify.com/s/files/1/0440/7217/3733/files/vertical_and_adjacent_angles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3860/4450/files/39736717407.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/kemojajaxux.pdf
    • https://cdn.shopify.com/s/files/1/0433/7519/8373/files/division_of_polynomials_examples_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/les_cestodes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/azure_cloud_adoption_framework.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.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_off00007832.bin
7b954142c2987bf4047f4f6cbea31b7a9a721cc0c8a271bc15a1d27829652fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 5512 bytes
font_01_sfnt_off00008af2.bin
8cf29975e00808063c1ab49bef2fe3bb10fdb4f3ccf3675484cbecee8713c4fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF2 10932 bytes

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