Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec30a54bb995fc3…

MALICIOUS

PDF

68.2 KB Created: 2020-08-13 23:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 808b050643e2b618e282a64e5411978f SHA-1: 74aeb05243804cab13c42154725167674664726a SHA-256: 6ec30a54bb995fc3a95bae15b011e057c8e92c81741b8d2920c217815c90927f
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary URL identified, https://ttraff.cc/pify?keyword=hypertension+treatment+guidelines+2018+jnc+8, is likely used to lure victims to malicious content. While no scripts were directly extracted, the PDF structure and link farm heuristic suggest an attempt to drive traffic to potentially malicious sites, possibly for phishing or malware distribution.

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/pify?keyword=hypertension+treatment+guidelines+2018+jnc+8
    • http://mizifeb.cloudcatchermedia.com/uploads/1/3/0/7/130739274/filifowovizu.pdf
    • http://files.priorityenvironmental.ca/uploads/1/3/2/7/132740415/poturowinu-pepurefeme-zomoxiru.pdf
    • http://zusidiza.whyrunnow.com/uploads/1/3/0/7/130775413/740784085.pdf
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/zonet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/26872992828.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/bufilakupixuvategalava.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/defuvawax.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/32390474918.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6857/files/60736120907.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/zokawasidima.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5798/files/calculus_on_manifolds_spivak_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/27291790854.pdf
    • https://cdn.shopify.com/s/files/1/0439/2134/2619/files/watimekakitutesegazelu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/bedelojuxakegogaxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/zowukafobojafovawuxilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7119/9642/files/introduction_to_electrodynamics_4th_edition_download.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_off0000cbcb.bin
7bdac19548e5753f27fa93ee96b86b0026f92b0e62dde2fff4b5210f43b4717c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCB 6052 bytes
font_01_sfnt_off0000e058.bin
824ba6da07f0f0fa788a1c653ced7fed1f595b66e7a2e28b8f9d09d005dffdc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE058 10140 bytes

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