Malicious PDF — malware analysis report

Static analysis result for SHA-256 f36125d9eedef388…

MALICIOUS

PDF

54.6 KB Created: 2020-08-20 10:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25bfe129f01f32bc53a1ba72df724ad9 SHA-1: 6c30a696b30004743f0a6866fb8eb74fb968b7ad SHA-256: f36125d9eedef388288fae8d85d7bbad8ba5f48c8acc0ad5afc24c322fbbda93
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL 'https://ttraff.cc/pify?keyword=registration+form+in+bootstrap+template+free' is a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious sites through a deceptive link farm.

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=registration+form+in+bootstrap+template+free
    • http://vajapadev.myduckdiary.com/uploads/1/3/2/6/132683169/tolenami_zapotijasoba.pdf
    • http://files.alfamwholesale.com/uploads/1/3/1/0/131070212/6645180.pdf
    • http://files.raworegonhoney.com/uploads/1/3/1/6/131636655/xobitamuwizubop.pdf
    • http://files.uxbridgeautoshow.com/uploads/1/3/1/8/131857419/3024571.pdf
    • http://files.paperboyproductions.net/uploads/1/3/0/8/130874333/kofuta_xumazizuraxu_bisugojorojid_poderasawek.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/canaux_ioniques.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/32272585312.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/folipevipesolozalogip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3609/files/99931717612.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/basic_laboratory_equipments_used_in_microbiology.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/cornell_silverman_arithmetic_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0459/2553/1815/files/53590098522.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/contoh_soal_medan_listrik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/43912170825.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/41025831804.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/venenatis_osrs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/game_pokemon_let_s_go_pikachu_pc.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/handycam_utility_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/50537441736.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097e6.bin
f4c59669d7b376869459f8a34cbbffe2ae9018864250f12eb87c8a46dcfabaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E6 5368 bytes
font_01_sfnt_off0000aa14.bin
6f6fba648e8a3857438688e3ea7fbb8ea3027baf24609f23342c0d72c6a0c02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA14 10288 bytes

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