Malicious PDF — malware analysis report

Static analysis result for SHA-256 471cf07a16e1e774…

MALICIOUS

PDF

34.5 KB Created: 2020-08-07 08:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3510f3ee89eff1983c752e1de7be3b4 SHA-1: ef8a8fa6d6dae8e5ee4025513fd4255ad21cdc89 SHA-256: 471cf07a16e1e774d1850f46f9c718566d65aadb728a38232ed29f791d38f057
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to a link farm designed to appear as free book downloads. One of the primary URLs, 'https://ttraff.com/pify?keyword=raavan+enemy+of+aryavarta+amish+tripathi+pdf+free+download', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains this malicious URL and other links, suggesting a lure to a malicious site.

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=raavan+enemy+of+aryavarta+amish+tripathi+pdf+free+download
    • http://files.atimetocraft.com/uploads/1/3/0/7/130740069/1e913a0e.pdf
    • http://files.cristiansulea.com/uploads/1/3/1/6/131606408/regokimotufatosuz.pdf
    • http://files.personalspaceproject.com/uploads/1/3/2/7/132740343/piwepapefa-kavijabojexopi-fuwuwumewa.pdf
    • http://files.saintclairstorage.com/uploads/1/3/0/7/130776712/7a1297a2385c.pdf
    • http://files.hoursfestivals.com/uploads/1/3/0/7/130776394/993831410c1761.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/acet_exam_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/wav_to_midi_convertor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/7485291735.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/calculus_8th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1084/files/general_mental_ability_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/lefozedekunabogasuvefipi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/wekoro.pdf
    • https://cdn.shopify.com/s/files/1/0429/6799/0438/files/water_pollution_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/68361951272.pdf
    • https://cdn.shopify.com/s/files/1/0432/7564/9180/files/graphing_slope_intercept_form_practice.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/pufewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0543/files/sevavexiboterukegof.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_off00004854.bin
fcb51ceb04acf04305c915da7b723e6f8c175caa77acaec45f3673dc46fc963e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4854 5544 bytes
font_01_sfnt_off00005b25.bin
efe7f23db0f970d12966c36655a43dea8791387a494d7b1d539457adf649e681		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B25 9904 bytes

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