Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b83301ffffb1c38…

MALICIOUS

PDF

53.9 KB Created: 2020-08-11 02:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25e0d05e8dbef641624109e2a01273c0 SHA-1: 34ecbb583c87c821242679c863b58104665477c2 SHA-256: 2b83301ffffb1c3856d2b6b68165c5dcc093d0feaaf2d3cc25a9d2efe953ec86
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an SEO poisoning or link farm tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. The document body, though heavily corrupted, contains text related to electrical installations and the URL itself, reinforcing the lure. No scripts were extracted, but the primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=appareillages+et+installations+%25C3%25A9lectriques+industriels+pdf+gratuit
    • http://files.anastasiabooth.com/uploads/1/3/1/3/131383581/ribeso.pdf
    • http://files.esuzanne.com/uploads/1/3/0/9/130968972/60398.pdf
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdf
    • http://pijowaf.blowingoakfarm.com/uploads/1/3/1/8/131858540/bexosisum_jexiwerig_tigonigugamurar.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/juxotalativasokokug.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/wufemupilowakugituduk.pdf
    • https://cdn.shopify.com/s/files/1/0429/8778/2297/files/radical_david_platt.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/how_to_stream_on_discord_with_sound.pdf
    • https://cdn.shopify.com/s/files/1/0434/1006/3527/files/class_11_chemistry_chemical_bonding_and_molecular_structure_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/40418504864.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/78740768576.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/lomebux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/dora_backpack_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/18150838703.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/73301551334.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/tales_of_symphonia_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/70948077926.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_off00008448.bin
05c97260136937e27d9301c966cdcedb3f68f8f700bf9827e6ad5577c04bff3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8448 5580 bytes
font_01_sfnt_off000096fe.bin
e9726013f395d7438d8e69bd488c3e19266eafb6552c3870b834a4543017408a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FE 16436 bytes

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