Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56c0db1263af30f…

MALICIOUS

PDF

63.1 KB Created: 2020-08-10 00:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1395c5fcc66ab666926db9401ada649d SHA-1: 761eeb905782c24c1a9d7783f15b20f3624f061f SHA-256: d56c0db1263af30f2e2ac49cd6111d23b79a9d40e852bac150613ecb197d3666
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for linking to malicious redirector infrastructure and for being part of a link farm. The document body contains obfuscated text and embedded URLs, including a suspicious link to 'ttraff.ru' which is known for malicious redirection. The primary purpose appears to be SEO manipulation or redirecting users to malicious content.

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.ru/pify?keyword=anexos+del+aparato+digestivo+pdf
    • http://files.livingsoulplete.com/uploads/1/3/0/7/130776462/adf0ff846c4.pdf
    • http://files.ukofc7464.com/uploads/1/3/0/7/130776828/5493087.pdf
    • http://pezexale.gfmenvironmental.com/uploads/1/3/0/7/130775129/wuxugu-lekezenisedi-dowaratabawid-tevapevefejebuf.pdf
    • http://files.adnpkids-researchfoundation.org/uploads/1/3/1/4/131453724/pewumevevupibem_babotavilosufib.pdf
    • http://files.thecryptocorp.com/uploads/1/3/1/8/131871740/1119637.pdf
    • https://cdn.shopify.com/s/files/1/0429/6212/4959/files/descriptive_inorganic_chemistry_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/96533092419.pdf
    • https://cdn.shopify.com/s/files/1/0436/3019/8937/files/yogananda_autobiography_of_a_yogi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9361/files/kiwalitekefadanudejazomil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4665/files/pamizigaguxigo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/warcraft_3_frozen_throne_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3178/1791/files/29882403899.pdf
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/natajurarizefade.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/zodatixokebux.pdf
    • https://cdn.shopify.com/s/files/1/0436/2669/2771/files/ripexametidinijonus.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7541/files/biochemistry_lehninger_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/7186/8821/files/aristotle_politics_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/allegro_free_physical_viewer_tutorial.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_off0000b7e2.bin
b28f4f3d47f7aba68a2c6290809815a2e1e79a4391bc51d5b62ba4ac08d44662		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E2 5328 bytes
font_01_sfnt_off0000ca1e.bin
fe17e989c9076998c17402c6a5880383f160ebdffdd290b0d13e8446f4f2fcfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1E 10748 bytes

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