Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e25c8d90e22da6…

MALICIOUS

PDF

40.1 KB Created: 2020-08-10 05:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaa43638e2e026b58fe325b5febe9285 SHA-1: 2f325a7593c618e98fc1a443af4bf77b4abbd223 SHA-256: d3e25c8d90e22da62f90073da450c244c1c9fe1b4b255ae61c434327c47ff053
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=prepositional+noun+phrases+exercises+pdf', suggesting a lure to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential SEO-based lure or link farm strategy to distribute malicious 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.com/pify?keyword=prepositional+noun+phrases+exercises+pdf
    • http://files.magidome.com/uploads/1/3/2/6/132681281/sulukugonasube_tagumovidaritag_worikikije_zikozuwugu.pdf
    • http://files.blessedtshirtskc.com/uploads/1/3/0/8/130814855/9687340.pdf
    • http://files.loddiedoddie.com/uploads/1/3/1/6/131636903/mufalu-womoxafax.pdf
    • http://files.mcyaf.com/uploads/1/3/0/9/130968921/naxekadolufelo-mokegorito-bosadaje.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/tazodavur.pdf
    • https://cdn.shopify.com/s/files/1/0451/4299/9194/files/cerita_rakyat_melayu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/sulavilojupitokenibivema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/gukevotulikexer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/linus_net_worth.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/58487206978.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/gre_analytical_writing_sample_essays.pdf
    • https://cdn.shopify.com/s/files/1/0427/7341/4055/files/67873719113.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/topik_intermediate_vocabulary_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/tusefevufixuralawabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53981477141.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_off00005ed2.bin
706d453bdb67ec56ac1818c35c0b0ce8e3bb7743122e428024e2e2b494118009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 5312 bytes
font_01_sfnt_off000070e1.bin
a461788e63eccb8a7a1baa14874035bc9d4eaa21c7366a650a3b4861b44a66bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E1 10012 bytes

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