Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97a725e0d5fff9b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-18 23:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e01044fca5a81ad3c94642ec44de2dab SHA-1: 61e72ab5062689a0ee61045424c210600a77f7a6 SHA-256: c97a725e0d5fff9b7ff3bc4d2d34e4905109ff3c0ed6ad43c79bfd7c8ebd79f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a direct link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains text related to 'Apc back- ups pro 1000va ups manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on cdn.shopify.com, which are likely part of a link farm to improve search engine ranking for 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.cc/pify?keyword=apc+back-+ups+pro+1000va+ups+manual
    • http://files.theredladybugdesign.com/uploads/1/3/1/1/131164129/fejefakevinilixuriv.pdf
    • http://files.deventermanueletherapie.nl/uploads/1/3/0/8/130814066/5039850.pdf
    • http://teneg.arcadiafsc.org/uploads/1/3/1/4/131407300/xopap-kobasusetiforu-sewonudiwa-zigudezudun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6764/5857/files/carillion_kpmg_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/0933/5715/files/pojonijogez.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/dijuduxilug.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/jogivivudugu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5781/files/nissa_tiida_2015.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/tuxinotof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/barcelona_tourist_map_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/concerto_for_2_violins_in_a_minor.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/32155750965.pdf
    • https://cdn.shopify.com/s/files/1/0441/1057/7816/files/canela_velho.pdf
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/fumewodebababe.pdf
    • https://cdn.shopify.com/s/files/1/0437/4642/7034/files/19914618004.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059eb.bin
cb375b1cc2d5d5dfcea0fcf7496f9f5d59d45ed79d18705c9af5fbd26eb78900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59EB 5556 bytes
font_01_sfnt_off00006cc2.bin
ca947a25ba025dc69cc44caa9a99e26318515c414745d40d5da90f61a8754580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 10116 bytes

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