Malicious PDF — malware analysis report

Static analysis result for SHA-256 d641c174a9b8783b…

MALICIOUS

PDF

46.0 KB Created: 2020-10-29 06:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77553ec5f6136aeaee88cbb7b27d24e5 SHA-1: 9415dc6529903f8782d4646baa3af51cbaa06c06 SHA-256: d641c174a9b8783bb9d775d173328fe869241035733b1c7be9d6a162451c317a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, with one specifically identified as a malicious redirector. The primary malicious link, https://ggtraff.ru/123?keyword=cable+one+boise+tv+channels, is likely used to funnel victims to phishing sites or download further malware. The document also exhibits characteristics of a link farm, suggesting a broad distribution attempt.

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://ggtraff.ru/123?keyword=cable+one+boise+tv+channels
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/wazapuzuxif.pdf
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/6462381.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0476/9493/8271/files/90944858526.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/manny_pacquiao_workout.pdf
    • https://s3.amazonaws.com/rovuweraja/bronkopneumonia_2017.pdf
    • https://s3.amazonaws.com/henghuili-files2/vavogasezuwozulo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/34050151032.pdf
    • https://s3.amazonaws.com/kizugokofo/enfermedad_hemolitica_del_recien_nacido_2017.pdf
    • https://s3.amazonaws.com/zupenafud/anaemia_workup.pdf
    • https://s3.amazonaws.com/jifesu/97925521337.pdf
    • https://cdn.shopify.com/s/files/1/0483/1422/0699/files/20473418052.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/22272523690.pdf
    • https://cdn.shopify.com/s/files/1/0484/6898/3969/files/billy_graham_nearing_home.pdf
    • https://cdn.shopify.com/s/files/1/0499/9928/2336/files/kugikudajuvumur.pdf
    • https://s3.amazonaws.com/vuxalirudidel/vampire_the_masquerade_nosferatu_sewers.pdf
    • https://cdn.shopify.com/s/files/1/0503/1788/5598/files/dawn_of_zombies_survival_apk_mod.pdf
    • https://cdn.shopify.com/s/files/1/0481/5329/7047/files/pifawupa.pdf
    • https://cdn.shopify.com/s/files/1/0486/1132/8160/files/lupojirimogikoxilajas.pdf
    • https://s3.amazonaws.com/zidosozawok/i_wish_there_was_a_way_to_know_youre_in_the_good_old_days_before_youre_actually_left_them_song.pdf
    • https://s3.amazonaws.com/jinabom/jobobil.pdf
    • https://cdn.shopify.com/s/files/1/0435/3264/8602/files/boy_scout_fishing_merit_badge_workbook.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_off00007739.bin
253b2a45f455710625ef44c5173972b2b0d50389e68cf340bf719c8ea874586f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7739 4896 bytes
font_01_sfnt_off000087e1.bin
7657ab8dde5a6d0bca632cef8f5a2d98c33765df50406ef82962d1c120a567eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E1 10284 bytes

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