Malicious PDF — malware analysis report

Static analysis result for SHA-256 95fc8383047701c8…

MALICIOUS

PDF

44.8 KB Created: 2020-08-26 05:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad47571045e09fb98ac814371f2f0c82 SHA-1: 85c9b45192cfd451f2220ea10f36be295d98c1dd SHA-256: 95fc8383047701c8334a52f9f911084fb86f6bb55e4daa0c044f7555061d5200
150 Risk Score

Malware Insights

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

The PDF contains multiple heuristic firings indicating it's a malicious redirector and a link farm. The primary URL, https://ttraff.ru/pify?keyword=pot+farm+grass+roots+cheats+pot+bucks, is flagged as malicious. The document body, though heavily obfuscated, contains this URL, suggesting the document's purpose is to direct users to this malicious site. No scripts were extracted, limiting the analysis of specific execution behaviors.

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.ru/pify?keyword=pot+farm+grass+roots+cheats+pot+bucks
    • http://files.losalamosquaranteencenter.com/uploads/1/3/2/3/132302736/1752024.pdf
    • http://files.local598.com/uploads/1/3/1/3/131398097/xemunaj_jeforasenu_ratur_dutajur.pdf
    • https://cdn.shopify.com/s/files/1/0438/3870/1728/files/public_time_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/xanufufobidavuvajokilozub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6513/files/classical_piano_sheet_music_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/amandemen_ketiga_uud_1945.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/fairly_oddparents_shadow_showdown.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2917/files/microsoft_leap_resume.pdf
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/google_academico_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/kijofexusefusimibonawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6566/files/1051670398.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/16620458210.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/albumina_humana_grifols_bula.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_off00006f1d.bin
69d9dd0710ba6627ccd5e61868efb4f46518108bea0975d6485e2542d7bdc36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 5600 bytes
font_01_sfnt_off000081fe.bin
05e7fcd1a2322b0e030e3289ff4c2d6ae69b966db17ce392670a8528ac53fdec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FE 10576 bytes

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