Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd4b54f6cdaa828…

MALICIOUS

PDF

47.7 KB Created: 2020-08-08 09:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8fb3616904a13e38d76239fdc8ff420 SHA-1: 02bf87d131726d5267e682dcc1f7f57644c79005 SHA-256: bdd4b54f6cdaa828481cb5d3a3ad35d0621ea9e0ed821fb033afeafe4688b80d
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.cc'. The primary malicious link is 'https://ttraff.cc/pify?keyword=morfologi+bakteri+bacillus+subtilis+pdf', which likely serves as a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=morfologi+bakteri+bacillus+subtilis+pdf
    • http://files.ronnytuvia.com/uploads/1/3/0/7/130775950/xuluvu_pafoluruguxe_belazedulixol.pdf
    • http://files.sciencerockhill.com/uploads/1/3/0/8/130813395/pufedepozujoke_xuwadud_xesigirerenag.pdf
    • http://files.christianlitforafrica.org/uploads/1/3/1/3/131380177/d3daf23.pdf
    • https://cdn.shopify.com/s/files/1/0440/5392/1957/files/lepuneputesasomokipoda.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/51073346226.pdf
    • https://cdn.shopify.com/s/files/1/0434/8857/5638/files/die_casting_defects_causes_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2346/files/janobol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6187/0741/files/george_bridgman_libros.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/tisukifakijapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/77721321764.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/the_kissing_booth_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/kings_and_queens_lyrics_aerosmith.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/miwiwifawaledatina.pdf
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/lefotazonab.pdf
    • https://cdn.shopify.com/s/files/1/0435/0348/5092/files/sims_4_crack.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_off00006f77.bin
5c4de186736e5252d19b727094ae75029dd9e304e43c307f909024fc4a710b83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F77 5532 bytes
font_01_sfnt_off0000825e.bin
8e7e431eda02a3f4b3fd5e5b0dc3f2a086fa89fce78aff9b37a9c515664c8ec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825E 14904 bytes

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