Malicious PDF — malware analysis report

Static analysis result for SHA-256 014a5ddc71c13e4c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 20:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75d3450fe7e7ac4f94efaa0ebeddeb01 SHA-1: 6b67ac68de76657cb6cb510ff36195a50709884d SHA-256: 014a5ddc71c13e4c214e16f99075939e925b2a1257b4f5a41fdf43e62383403a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'gba emulator windows 7 64 bit' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a potential SEO poisoning or link farm tactic to distribute malicious 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.com/pify?keyword=gba+emulator+windows+7+64+bit
    • http://rupuka.littlesharkandco.com/uploads/1/3/1/4/131407668/terejanawigonegeb.pdf
    • http://bekopi.happyhazelnut.com/uploads/1/3/1/8/131856543/9418727.pdf
    • http://vodika.bluegrassstream.com/uploads/1/3/1/8/131856543/foboka.pdf
    • http://tajop.williamsburgnaz.org/uploads/1/3/0/8/130814124/720a18cdc24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/0572/8152/files/beat_maker_go_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/71459237440.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/merexasewaxetu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1588/files/evangelios_apocrifos_borges.pdf
    • https://cdn.shopify.com/s/files/1/0431/6279/6186/files/lasazadebobusap.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2308/files/profit_carried_forward_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/54986265052.pdf
    • https://cdn.shopify.com/s/files/1/0437/1061/1605/files/pdf_to_word_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/6327/0815/files/daily_affirmation_cards.pdf
    • https://cdn.shopify.com/s/files/1/0436/1096/4131/files/56517803245.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/8732579981.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_off00006a8c.bin
f1576ed563e373fc4b82366442726e0638269e623c1759a2203384478312c224
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 5556 bytes
font_01_sfnt_off00007d83.bin
59f057cd2b3a05ca3455d26fdb74df405e3c83da59ee37c3e1365ebe5bfedae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 10588 bytes