Malicious PDF — malware analysis report

Static analysis result for SHA-256 1341e1bfe079ca4b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-23 11:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20ab0d58a2f869d90435c117b7bd3e32 SHA-1: 155300e687fc8ac52065b529f3b086154ac4b9b9 SHA-256: 1341e1bfe079ca4baf284a7c12ab204e2edde1dc737a3a10b5c23c7b69e0909f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, includes text related to financial reports and the malicious URL, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=analyse+and+interpret+financial+reports+acca
    • http://maputal.islandcitypublishing.com/uploads/1/3/1/6/131606419/kibizodebesi_fujadajaluwok_vowixuwazoni_tubabuvivijoxug.pdf
    • http://files.megaciph.com/uploads/1/3/1/3/131378916/rowofadun.pdf
    • http://tozizog.kochtaxidermy.com/uploads/1/3/1/3/131398560/vuzekewavas_fafisiburu_pivatazizamatid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/46803853191.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/banjara_banjara_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/calligraphy_letters_a-_z.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/bike_race_game_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/11858590877.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1413/files/windows_movie_maker_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/wofoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7407/files/enlace_quimico_covalente.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/guxazifawuveda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/weather_killington_vt_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/9653/9290/files/plantas_alimenticias_no_convencionais_valdely.pdf
    • https://cdn.shopify.com/s/files/1/0435/8507/7405/files/viwikopexuwurutagu.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_off0000602c.bin
ddf157d320f97e212bf7a705f1b56ad20218f1dc0d51e8312a8e223024099a65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602C 5028 bytes
font_01_sfnt_off00007151.bin
eb625e8c12f5ea21c1f0b6bb7a612137a0dadb9109afd1a06d9c7c0356d958c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7151 10016 bytes
font_02_sfnt_off000093a2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A2 4324 bytes

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