Malicious PDF — malware analysis report

Static analysis result for SHA-256 64aacf9fdd863190…

MALICIOUS

PDF

42.1 KB Created: 2020-08-18 22:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca72c491429aee32141acf3a2053495e SHA-1: 299e133e1ac28b47f495d7ec303d2425f20eed1e SHA-256: 64aacf9fdd8631908b4ba6abeb47a4354d0724db7ba5ea2822a851293af6f2d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to lure users to potentially malicious content or phishing sites. The ML classifier also strongly flagged this PDF as malicious.

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=campaniform+sensilla+locomotion
    • http://bodigub.cathybinghamphotography.com/uploads/1/3/1/3/131380600/razukusa-dibofulos-mijavatuwanopo.pdf
    • http://files.cleanmachinelongview.com/uploads/1/3/1/3/131381109/9b6113c.pdf
    • http://jurusu.gardenandpondmaintenance.co.uk/uploads/1/3/1/4/131437246/9d3207c24d294e.pdf
    • http://files.chipplondon.com/uploads/1/3/1/3/131379868/makolenomut_winefuta.pdf
    • http://jawubel.jericosoundsystems.com/uploads/1/3/0/7/130739695/gitusifikaxog_setixetebap_sesumanutuke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/0972/6888/files/70234900029.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/31412578327.pdf
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/61336926388.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/quadratic_equation_examples.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3151/files/31922496410.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/ruxotekar.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2523/files/boyer_biochemistry_laboratory.pdf
    • https://cdn.shopify.com/s/files/1/0433/6336/9125/files/85905272610.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/21863359185.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/bid_wars_mod_android_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/questionnaire_sur_l_absentisme_au_travail.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_off000066ce.bin
0fc419219910509664e09dadc2adbc546d2e9f7b0eb6206f284e3870886ea773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CE 5064 bytes
font_01_sfnt_off000077f0.bin
e3ea38a5594ccf79b3ca7a419e7f83b857e8397343337e0ca81be2fe10debca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F0 10476 bytes

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