Malicious PDF — malware analysis report

Static analysis result for SHA-256 1354cb117d9a1b63…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 12:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e20480fc7b299714081580658aa884de SHA-1: 2ccea5e0e2e04cfb21d5d0ebcf0435f9570a001e SHA-256: 1354cb117d9a1b6381a3521d43499173a96329d90e4cbc075898bbbcb06b4f59
154 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though partially corrupted, contains text related to a 'winners list' and embedded URLs, suggesting a lure to trick users into clicking the malicious link. The presence of multiple PDF links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/pify?keyword=addis+ababa+city+administration+condominium+houses+winners+list+pdf
    • http://files.nancysniftynotes.com/uploads/1/3/1/0/131070539/d5e4824ed04.pdf
    • http://mowun.anacasasmd.com/uploads/1/3/1/0/131071243/tavekup-gutaku-bazegogexiv-bixoguraribugot.pdf
    • http://files.donsellmaninvite.com/uploads/1/3/2/8/132814742/zakupirafamogekus.pdf
    • http://files.theallornothing.net/uploads/1/3/1/8/131871690/4aeb76bcb5d5081.pdf
    • http://files.theapplecasestudy.com/uploads/1/3/1/8/131871633/85888c3f0910877.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2246/7740/files/36232353949.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/buziwowibijobok.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/dutedilopabas.pdf
    • https://cdn.shopify.com/s/files/1/0450/0701/1998/files/twitch_chat_obs.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/binary_search_tree_in_data_structure.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/77490834734.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/attractions_ontario_reciprocal_program.pdf
    • https://cdn.shopify.com/s/files/1/0436/6696/4630/files/mifiluteduxegizaxowadugef.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/14074967722.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/algebra_1_final_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/alkyl_halide_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/55608820228.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_off00006478.bin
7e5d2c5bb4a12b91c7bc76bb5a37973b30bedcf0641dfbca73e3e86afff8b85c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 5716 bytes
font_01_sfnt_off000077d8.bin
c1c530d8da2fac13a44e5f8bd3b92ce041341e0bd2e0445fd0c674b198f6580e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D8 10796 bytes

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