Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d0abda73ae4246…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 08:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6511e80b8c84aec03f595357d849a0b7 SHA-1: fc8517b97f123616dda56e2a929f35ddac4aefc3 SHA-256: 12d0abda73ae42468e7618a48fe4e8fc2b561f2f0d1282d6169753808c78a78f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are designed to appear as academic resources. The primary malicious link, 'https://ttraff.ru/pify?keyword=advantages+and+disadvantages+of+learner+centred+approach+pdf', redirects to known malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, further supporting the malicious intent of directing users to potentially harmful 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.ru/pify?keyword=advantages+and+disadvantages+of+learner+centred+approach+pdf
    • http://regigali.mountainharvestfarmllc.com/uploads/1/3/1/6/131636664/lapulofigura-jagorefes.pdf
    • http://gilede.velobristol.com/uploads/1/3/1/6/131607163/60107.pdf
    • http://files.slocampnpack.com/uploads/1/3/0/7/130776401/jofagupasob-sajajopaban.pdf
    • http://files.artistiquegym.com/uploads/1/3/0/7/130739449/siwimufof.pdf
    • http://files.sydneyraynehewitt.com/uploads/1/3/1/6/131637021/764450.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/rosorawonevaxebu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/gefuwuwabobi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/juxaromax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9073/files/zikuvelaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/8694/5187/files/17831267733.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/tiwokefaxaxutogapikokupop.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/xodebemegilobef.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/75336270699.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/futomufopokavunitudexebin.pdf
    • https://cdn.shopify.com/s/files/1/0435/7200/2974/files/bemumirir.pdf
    • https://cdn.shopify.com/s/files/1/0430/9286/9281/files/writing_fiction_burroway.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/tascam_dr40_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/convert_to_word_arabic_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/ear_acupuncture_points_chart.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_off00006861.bin
e8a76be9bae84cd95063fee3d3ceffc62c585e2e81cfccaa9454c7ef6efcbb60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 5464 bytes
font_01_sfnt_off00007b00.bin
d3900ee4b1ef2e67e3c13c1f854db2618ffe5bfd78340dc600f62cbda3be8648		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B00 10368 bytes

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