Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcdfe52489888b9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 15:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f704eed6c0c187359ebcd0c45be6e9e2 SHA-1: c74dfe6ec049fd87cb59897ce6d1888eb17994e8 SHA-256: 6fcdfe52489888b910c3cd40a9720f51558c7989a16393b7813eb73a5b76d434
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a redirector service. The primary malicious link directs users to 'ttraff.ru', which is flagged as a known malicious redirector. This suggests an attempt to lead users to malicious content or phishing sites, likely delivered as a spearphishing attachment.

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=baby+kissing+wallpapers+for+android
    • http://files.erte.us/uploads/1/3/0/8/130815437/d59b6.pdf
    • http://files.r94israelrising.org/uploads/1/3/0/8/130874039/jukegifodofow_midogijefokerej_tujubude_gajaropifojogot.pdf
    • http://xafiti.bluemoonbeautyandskin.com/uploads/1/3/1/6/131607712/kunenotoka-govuwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/89627579145.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/active_treatment_of_depression.pdf
    • https://cdn.shopify.com/s/files/1/0437/8142/3262/files/robatubetolavilizujonax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/tratamiento_de_anemia_falciforme.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/anaphylaxis_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/free_album_barasuara_pikiran_dan_perjalanan.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/jasomafosazokevon.pdf
    • https://cdn.shopify.com/s/files/1/0434/2179/4460/files/mathematics_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2141/0210/files/66293536072.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/zuvasosopezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/action_research_project_for_b._ed_students_in_english.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_off00006fb6.bin
dca7361a86092c5da45ede70b6fbdd7c5977aaef0588d62a3ac5b5265e8156c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB6 5656 bytes
font_01_sfnt_off00008313.bin
f67f03a6f1c09d4449000903a338f74f3bb3c63c861ee59dad02ad160eca3f8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8313 9948 bytes