Malicious PDF — malware analysis report

Static analysis result for SHA-256 70f7dda3eedaf7eb…

MALICIOUS

PDF

37.6 KB Created: 2020-08-22 08:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6db18879fd1696f41063fbf131f8200 SHA-1: 38a4e04438ade837f95557e2a4b4c3ff9dc89fdb SHA-256: 70f7dda3eedaf7eb4db8047a39685137ded8521411605758bddb45062eed69ac
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=european+accident+report+form`. The document body, though partially corrupted, suggests a lure related to an "European accident report form", indicating a phishing or social engineering attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=european+accident+report+form
    • http://files.thebigfootstudio.com/uploads/1/3/1/6/131637606/6778446.pdf
    • http://suwok.thequiltinggardener.com/uploads/1/3/1/3/131380126/pijavufixom_majojexo_desaw.pdf
    • http://dikasup.valerielecomte.com/uploads/1/3/1/3/131378776/nebopas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71299233386.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/lopupapoguf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/golujebudifujolunosetu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/94292601138.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/baxadobixolatuwemamax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/kubofivakomolobajib.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/75838324919.pdf
    • https://cdn.shopify.com/s/files/1/0440/8393/7432/files/crisis_del_canal_de_suez.pdf
    • https://cdn.shopify.com/s/files/1/0434/1396/2919/files/albertine_disparue_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/60571498686.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/calendar_ortodox_2019_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/bd_chaurasia_quora.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/fofafilugobosekofida.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_off0000572d.bin
b6aafcb3904fce9b1d893c04bc0245c0a15d12ecfaec45adda05cb9577bb1780		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572D 5048 bytes
font_01_sfnt_off00006846.bin
cea9f4e8e6266cd1d323e0570db76bd10a87a03e2220b0d7b3f1d0c5f642fbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 9828 bytes

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