Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cb7fe52b0e9a4c…

MALICIOUS

PDF

50.2 KB Created: 2020-08-30 10:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac2359a70038317085a5ce2fccbf91ed SHA-1: 459a305c70fd3f046003822d2be8bf044ecd723c SHA-256: 08cb7fe52b0e9a4c4e64548a9291e79b07a3a8d5f1df5aea83536fe2c816d1e8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This suggests an attempt to direct users to malicious content or phishing pages. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the primary attack vector appears to be social engineering via link farms.

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/wix?keyword=vers+la+phono+ms+access+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/a4_folded_birthday_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/53528226996.pdf
    • https://cdn.shopify.com/s/files/1/0437/2974/8122/files/vuwitedak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5940/4191/files/xukinupiluloxesejup.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/alesis_sr_16_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/2789/6219/files/soluciones_biologia_y_geologia_3_eso.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9458/files/zosupu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/editing_documents_in_adobe_reader.pdf
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/gakupamiwumumete.pdf
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/22183256350.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/95346796525.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/eragon_first_book.pdf
    • https://cdn.shopify.com/s/files/1/0461/1345/6291/files/atomic_absorption_spectrometry_principle.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/zotonuguwepifimufidulugap.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/early_adulthood_development.pdf
    • https://cdn.shopify.com/s/files/1/0437/7496/7965/files/diploma_electrical_engineering_books_free_download_in_gujarati.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000870d.bin
96e50ce91610ff29d83ddf5cd394a2381d8024cc2f889d3f6290bb81262b2c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 5360 bytes
font_01_sfnt_off00009918.bin
b722a088f43d2153edcad8f1dd2bff110e66886ed8ceefd914e697cd91625ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9918 10120 bytes

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