Malicious PDF — malware analysis report

Static analysis result for SHA-256 84401d9f74b9e183…

MALICIOUS

PDF

62.4 KB Created: 2020-07-24 11:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c47baf0cd47121eea05e95494adb3df SHA-1: 129c29e350f6a6139ad624ee554a771c0f2c47b2 SHA-256: 84401d9f74b9e183df82159ccb80e44fe7c03766002e420c7c21f3cb872acff1
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one identified as a malicious redirector (ttraff.cc) and another pointing to a potentially malicious domain (supernaturalentertamitedproductions.org). The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. The document body, though heavily obfuscated, suggests a lure related to 'lyrics pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=achyutashtakam+lyrics+pdf
    • http://files.supernaturalentertamitedproductions.org/uploads/1/3/1/4/131455883/visemomitowezij-fezaweku-xevut-kixivim.pdf
    • http://files.myworldseye.com/uploads/1/3/1/3/131397973/pavadube.pdf
    • http://files.russkinkade.com/uploads/1/3/1/3/131398322/mozurejibo.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/73476867820.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/67628927296.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gevuruliwineda.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/62067018071.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/nenagisuzesukutes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/63779735318.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/61455419198.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/85956316201.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0429/4852/6246/files/63089531596.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21511039237.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0000b934.bin
2e4fba931ce66ac3479e69651f458068bf4f13b03626207609f196937b2286a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB934 16048 bytes
font_00_sfnt_off00007a29.bin
2df226dfd49b1b49d8ad8d1da74c87e82ea5c250472d176540cc01b6624aed88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A29 5100 bytes
font_01_sfnt_off00008b7c.bin
4cd60777e265fafd80a6c4ac8a8f541642313e2b1c6670a3899fdf55b12f51bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B7C 3772 bytes
font_02_sfnt_off00009720.bin
eeb5d5ef8db799b001acde68800e0c0276fd68d0373b0b54373d863be67f1193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9720 9876 bytes

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