Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bc672e97e1d5ad7…

MALICIOUS

PDF

40.7 KB Created: 2020-10-04 05:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d84c7a5ed3b20f9e16dc666c99e1a048 SHA-1: 14643ecaf56eb0ad6a4c90f429bfcfa7f51be461 SHA-256: 6bc672e97e1d5ad7db0b982b2f67d16a3517cbd4c2e7514a93b3bee7e37a9346
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable domains and appear to be part of a link farm. One URL, https://cctraff.ru/pify?keyword=suzuki+ozark+250+oil+capacity, is flagged as a malicious redirector. The document's structure and content suggest it is designed to either distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/pify?keyword=suzuki+ozark+250+oil+capacity In PDF document text
    • http://files.cancercantkilllove.com/uploads/1/3/2/6/132696178/fisijesugexitifuk.pdfIn PDF document text
    • http://files.springsfbc.org/uploads/1/3/1/0/131071137/bavopofa.pdfIn PDF document text
    • http://files.antoniosajid.com/uploads/1/3/1/4/131409244/2c919441f45.pdfIn PDF document text
    • http://wiset.leatherworksfordogs.com/uploads/1/3/1/4/131438245/sixuwugi.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/gipanodadapude.pdfIn PDF document text
    • https://site-1040179.mozfiles.com/files/1040179/61889731569.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/zipemimepolejomiwugo.pdfIn PDF document text
    • https://site-1037279.mozfiles.com/files/1037279/lotojonigenewek.pdfIn PDF document text
    • http://files.kbsakirksville.com/uploads/1/3/2/8/132815752/6495856.pdfIn PDF document text
    • http://files.exportactionusa.com/uploads/1/3/0/7/130776349/7552732.pdfIn PDF document text
    • http://vijowaki.londonstreetgallery.org/uploads/1/3/0/9/130969707/likogeporo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0330/7926/files/54233350351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6878/2757/files/bodoninatiburufafipado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3441/4751/files/dream_car_racing_evo_2_hacked.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F34 5464 bytes
SHA-256: 2dddec7f70ac1e15b426a2533624a7d5eb319f82e46d269d1af5fd3270e0ac4c
font_01_sfnt_off000071f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 10624 bytes
SHA-256: 98b17e14b3f82cea2abcb5aa00017d076ae1e4e17ee9b212dd8c6084a91c1b32

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