Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f54ae8d4a6472…

MALICIOUS

PDF

67.4 KB Created: 2020-08-11 00:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d2cbbb9284afc739b041c1d0edc9f54 SHA-1: a376682532d3621133699198d209f689186feb36 SHA-256: e48f54ae8d4a64726661a5ed8725cf21d0942f10a4a2d0444617dc8fbce13650
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=the+neophyte+s+guide+to+scala+pdf+download'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL and the PDF structure strongly suggest a phishing or redirection attack.

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.cc/pify?keyword=the+neophyte+s+guide+to+scala+pdf+download
    • http://files.vaalrivercitymarathon.com/uploads/1/3/1/1/131163858/zufizut-dupagipa-rimopuki.pdf
    • http://files.cosmexmelbourne.com/uploads/1/3/1/3/131383630/fewolarogur.pdf
    • http://files.southernpointers.com/uploads/1/3/2/6/132695582/d512820f6b09d68.pdf
    • http://files.alaskaforreal.com/uploads/1/3/1/6/131606697/fewivikotubefo-nujuzekixifu-waruwotem-rexopuzeb.pdf
    • http://files.robinsonauctionservice.com/uploads/1/3/1/0/131070216/1e469d167d3a47d.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2992/files/javitufiwoditomi.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/tulatulavixa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/wudutamuduv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/tipusafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/86813659155.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3565/files/taren.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/buku_biologi_sma_kelas_11_kurikulum_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/rebosulalerumulaxuviva.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/sokutejizuzegeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3556/5990/files/the_odyssey_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/argentina_currency_crisis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/buzixoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/todiruwe.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_off0000be5b.bin
089241be78b4b37e559f2040f6d0f70f9a3025281572ea169908da7b52ff84e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5B 5464 bytes
font_01_sfnt_off0000d10c.bin
4399ae47fb983bb526525ec521904b13115cc3fa28a99dc6162bf2c0f44ff0d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD10C 15256 bytes

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