Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc042532adbc6d98…

MALICIOUS

PDF

38.4 KB Created: 2020-08-23 08:39:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22adf281968e4781a7fd315349bef3b SHA-1: 6978586c46b91bd9a6e2cf67632bbe7d3ed8f45f SHA-256: cc042532adbc6d98af66ba19be55576b0cef5a96df10ed892d11c798d9ea2eff
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the same URL found in the heuristics, suggesting a deliberate attempt to drive traffic to malicious infrastructure. 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=accident+report+today+pretoria
    • http://files.youniqueeventdesigns.com/uploads/1/3/1/8/131871414/4059920.pdf
    • http://lonozelix.mummamovement.com.au/uploads/1/3/2/7/132710621/9776474.pdf
    • http://xawumo.elizabethcyr.com/uploads/1/3/1/4/131453872/nogasasesesan-wezavukesipa.pdf
    • http://files.jameswestdavidson.com/uploads/1/3/1/3/131381332/sigesunoxex-basixif.pdf
    • http://files.sonescs.com/uploads/1/3/1/6/131606807/3455393.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/93610209506.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/13778107026.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/cents_symbol_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0449/5409/1675/files/c_csv_writer.pdf
    • https://cdn.shopify.com/s/files/1/0434/3247/6838/files/nemofixagojanirad.pdf
    • https://cdn.shopify.com/s/files/1/0437/1025/1176/files/utorrent_free_movies_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/34549782394.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/spanish_learning_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/2664/8985/files/tinkers_construct_modifiers_1._7._10.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/ladeworamam.pdf
    • https://cdn.shopify.com/s/files/1/0463/6891/5617/files/inert_pair_effect_chemguide.pdf
    • https://cdn.shopify.com/s/files/1/0436/9917/5579/files/classroom_seating_chart_template.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_off00005067.bin
6704a067e51dcec1a81fe17dba679e77ebfc5c1b056469e42aed8d5a60cb59ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5067 4948 bytes
font_01_sfnt_off00006139.bin
ddfb70b97d7d9c88250288b8ad59685d0c00373885a0cc42592d5ca668ac4044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6139 2392 bytes
font_02_sfnt_off00006ab2.bin
bec5da6d28b9b9248daec4c11bf327a226ff4ae80bc3be1b38b560d027349e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB2 9796 bytes

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