Malicious PDF — malware analysis report

Static analysis result for SHA-256 68364a1d7c5dcffa…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 14:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d5e78a17153c35d73a83fb78b764fa2 SHA-1: 818ee5a1b6df9b7d2bfc43cea916ac6b2a3d850e SHA-256: 68364a1d7c5dcffa775337efcda3679a426420ef3367591c3a031cfad21709ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting the document is designed to lead users to 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=action+sheet+ios+react+native+example
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • http://deroj.glasshousecafemq.com/uploads/1/3/2/8/132816066/kefigaloguvovik.pdf
    • http://files.mjremodel.net/uploads/1/3/0/8/130873708/wipotixomikavi.pdf
    • http://files.lightsoutbaltimore.org/uploads/1/3/1/0/131070718/1149199.pdf
    • http://pasodapo.rautiaguitars.net/uploads/1/3/1/8/131856158/zozarosomud-nulafumej-gevubidunagofuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/nuwotivofari.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/pejajubaziv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/lolodinokexonesilifijowe.pdf
    • https://cdn.shopify.com/s/files/1/0435/8212/8283/files/15564740579.pdf
    • https://cdn.shopify.com/s/files/1/0435/7128/2079/files/bebikaworitexurobanus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/13644448663.pdf
    • https://cdn.shopify.com/s/files/1/0449/1457/3467/files/espejos_eduardo_galeano_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5766/files/42846587340.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/sunaposapamegejixuzito.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057f4.bin
d79793ed7e1f00cc732fb9b2aefd4e7a67d645b43802d4846219a38b9aae096f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F4 5080 bytes
font_01_sfnt_off000068fd.bin
0f32dab2ba59fb4586e36779318950e01332ed2a79713897b45f917494bf44ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 14420 bytes
font_02_sfnt_off000096ed.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96ED 4324 bytes

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