Malicious PDF — malware analysis report

Static analysis result for SHA-256 1787977f3bc2d88e…

MALICIOUS

PDF

60.9 KB Created: 2020-08-09 05:42:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e17196b3fa676043ffa7142917b176 SHA-1: be23abfbc487ebeaddf4c19eb3206e287338a43a SHA-256: 1787977f3bc2d88e7cf47a22ea61331fdeb51e0aac2935cdcc0865c8a8ee7f7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure, referencing 'risk rules pdf' and embedding the malicious URL. The presence of a large number of external PDF links suggests a link farm designed to attract traffic or distribute malicious content.

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=got+risk+rules+pdf
    • http://files.minymabooth.com/uploads/1/3/0/7/130738513/60fe9a.pdf
    • http://files.marjoriejohnsonart-design.com/uploads/1/3/0/7/130739340/7396599.pdf
    • http://files.deeperwalkoffaith.com/uploads/1/3/0/8/130874620/tiwufokigatizez.pdf
    • http://files.gruverstreefarm.com/uploads/1/3/1/3/131398308/pirijusaba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/causes_of_abnormal_behaviour_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/agriculture_bio_intensive.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1433/files/jealous_lover_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/gulutuxosumezujebor.pdf
    • https://cdn.shopify.com/s/files/1/0434/8398/8125/files/convert_set_to_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/jquery_on_radio_change.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/62022045535.pdf
    • https://cdn.shopify.com/s/files/1/0431/6545/0391/files/rajowora.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/53998259403.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lodusabivafanexufuzumolu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4166/7734/files/85084394317.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_off0000a55d.bin
74ec9bc2015beda73f57a7d6112f15812cfdc8f46ac20a2623dfb0d4d3cacaec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA55D 4696 bytes
font_01_sfnt_off0000b579.bin
517a7550a1509b12e94c43c256ace470599e4a67a78be2340d2bef4bdf187758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB579 10164 bytes
font_02_sfnt_off0000d862.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD862 4324 bytes

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