Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff74de97163a4da2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 07:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32169e74c813eb491c46bc5e415879c8 SHA-1: 9c16f8cb38bc55dffd2165d43d3ba54fbb762fe0 SHA-256: ff74de97163a4da2d75dae2161b49a9853bde184abe1bd2601b73045cad44c8c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, contains text related to creating dropdown boxes in Google Sheets, suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content or engage in SEO manipulation for phishing purposes. The ML classifier strongly flagged this PDF as malicious.

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=create+drop+down+box+in+google+sheets
    • http://files.lisasturm.com/uploads/1/3/0/8/130874612/negiligag-welibugusug-fezudagelavibel.pdf
    • http://files.saveurlifeoutreach.com/uploads/1/3/1/1/131163898/8816331.pdf
    • http://files.chardehenderson.com/uploads/1/3/0/7/130740242/jojikavafagiro.pdf
    • http://files.hhrstrategies.com/uploads/1/3/1/8/131871829/jetamonike-gekavukas-kuxesivi.pdf
    • http://files.elisaeliot.com/uploads/1/3/1/4/131406435/nopavizolot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/52975649310.pdf
    • https://cdn.shopify.com/s/files/1/0450/0389/9048/files/crafting_guide_gw2.pdf
    • https://cdn.shopify.com/s/files/1/0463/2962/6781/files/accepting_a_job_offer_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0435/7275/6648/files/bruselas_mapa_turistico.pdf
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/82472320334.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1641/files/zekavudomo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/deep_breathing_for_anxiety.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/official_scrabble_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/219_bus_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/encounter_shankar_movie_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/23135931134.pdf
    • https://cdn.shopify.com/s/files/1/0463/2671/0433/files/vomazo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006894.bin
f42a1aaadad620b2cad58a79d9d8e518992e78a880b2e6baed002d59b79f9c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6894 5428 bytes
font_01_sfnt_off00007b0d.bin
a538ea6d45335ba6822a751271f0b874936fdd159bff508011074c58bab5a246		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B0D 10044 bytes

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