Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ab311f3e1335d5…

MALICIOUS

PDF

42.7 KB Created: 2020-08-18 18:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89456e63f33db92f3640cb1edf112eec SHA-1: 25de9e3419da065cc0a9ecf8ad43454fe1617379 SHA-256: 64ab311f3e1335d540d357a97a34e34dbce6f291c4e0a161332ede25dcade85e
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a report title, aiming to trick users into clicking it. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or redirection campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack, likely initiated via spearphishing.

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=tcode+for+machine+breakdown+report
    • http://files.pvjacksonwriter.com/uploads/1/3/1/3/131381450/1088063.pdf
    • http://jekitam.prisonchoirproject.co.uk/uploads/1/3/1/4/131453133/wixisoda.pdf
    • http://zekikewi.camdencollaborative.com/uploads/1/3/1/1/131164394/torisa_rusapojanowi_xerali.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/6685/8408/files/mezupaxaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2632/5409/files/28318637112.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/51469872903.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2057/files/5904418419.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/numexesisefedevibut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/28116790292.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/debowele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/duzokafoniwomawalil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/20550425906.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/james_stewart_early_transcendentals_7e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6486/0575/files/accrual_accounting_definition.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cb2.bin
db3b81500604a9185ee8ef30478a8ce2bc8b9e0de565198e6a7546abda2b4b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB2 5216 bytes
font_01_sfnt_off00006e45.bin
b8bf8390b16c38c1daf1bf9344a2b8fe60b456e800fba97f5efaec0ed8c3044f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 10060 bytes
font_02_sfnt_off00008fda.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDA 4324 bytes

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