Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ac0449db70fe76…

MALICIOUS

PDF

46.6 KB Created: 2020-08-03 00:42:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 308b02ceedab08ef00f2c3b9be702218 SHA-1: 31647bea863515ea52c13e653b0b2080d83b0371 SHA-256: d6ac0449db70fe76601cbe6360f4d1e40d69759a392a49e8d14a71f065bed7f5
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=setting+up+nightbot', is identified as a known malicious redirector. This suggests the document's purpose is to direct users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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=setting+up+nightbot
    • http://files.ceresevents.org/uploads/1/3/2/6/132680994/jebixejixokivo.pdf
    • http://files.macjannet.org/uploads/1/3/0/8/130874457/xifipubovigop-xesakinesaxu.pdf
    • http://files.dianebowen.net/uploads/1/3/1/4/131410747/bizesibejosedifojun.pdf
    • http://files.authorconsultants.org/uploads/1/3/2/3/132303219/9a6ec241462de0.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/sasolirajex.pdf
    • https://cdn.shopify.com/s/files/1/0436/3229/6089/files/86623480965.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/ar_15_lower_receiver_assembly_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4245/files/gorizurugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1587/files/jewixige.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/23503152574.pdf
    • https://cdn.shopify.com/s/files/1/0437/7827/7525/files/saxon_math_intermediate_5_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/mary_kay_corporate_offices.pdf
    • https://cdn.shopify.com/s/files/1/0429/4941/0979/files/61579145756.pdf
    • https://cdn.shopify.com/s/files/1/0432/2125/4312/files/wuponexalaturoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94323725826.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/8192109605.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/at_first_sight_movie.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/pajavonojebupegamopo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1959/7981/files/datewujazoda.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a40.bin
425e6ddebdfbe664a1a71974e6c45971dd3da8b4c1aa9d5870487591e69933c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A40 4688 bytes
font_01_sfnt_off00007a29.bin
076b3f8f520b6c77466404b776418035dc8ef4041399dcc75aa82ad8d432ee81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 10848 bytes
font_02_sfnt_off00009f04.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F04 4324 bytes

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