Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5d1da051e3d12d…

MALICIOUS

PDF

44.5 KB Created: 2020-08-05 17:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2efaaea2861c1d1db7e35177bcf5915 SHA-1: d6a2ccdd39d4cec52f920ed9694b9d4980d26bd0 SHA-256: ed5d1da051e3d12d3d2860b7b493cd712cb70cec8566846ee8867adbd9f9ed11
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The embedded document body contains a URL pointing to 'ttraff.com', which is identified as a malicious redirector. Additionally, numerous links to shopify.com domains were found, suggesting a large-scale attempt to host and distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=analogy+vocabulary+pdf
    • http://files.colorfulthreadsembroidery.com/uploads/1/3/1/4/131438282/3906032.pdf
    • http://files.rcffs.org/uploads/1/3/2/6/132681969/8347285.pdf
    • http://files.emblempta.com/uploads/1/3/2/7/132712268/kodov_badafanebof_pabika.pdf
    • https://cdn.shopify.com/s/files/1/0430/0845/8905/files/vamoweduwivukufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/gibutabugetomodusapufavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/notinigasulijir.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/lit_my_own_worst_enemy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0441/3282/7288/files/xepugazuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/66238998793.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/nokovuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/woruvazazagax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/99288041742.pdf
    • https://cdn.shopify.com/s/files/1/0430/6652/3809/files/bass_tracker_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/79415420726.pdf
    • https://cdn.shopify.com/s/files/1/0436/2207/2480/files/dragon_ball_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0433/9331/9079/files/5728434574.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/dungeons_and_dragons_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f7.bin
77add05e74010c81291b4ade135d497ba79b890ccc4375157830886eccef1f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 5072 bytes
font_01_sfnt_off00007442.bin
6537d6065d9ee0c84f2dcc97c842f1e307c43c0b72d44cb03fb62f9615a0eaed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 10156 bytes
font_02_sfnt_off000096e9.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E9 4324 bytes

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