Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fd0d17a0bf05b9…

MALICIOUS

PDF

59.1 KB Created: 2020-08-07 16:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae1a3bb019b55a8172aca8a2a289f9b5 SHA-1: db60a8c59e21c4867f55448de690e2609eecc76f SHA-256: 72fd0d17a0bf05b9a3773f92eccda79e8e825017502b6c5f4f5c0600af2f8606
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=brian+tracy+sales+management+pdf'. This URL is likely used to lure victims into downloading further malicious content or phishing for credentials. The presence of a large number of embedded external PDF links also suggests a link farm or SEO poisoning attempt to increase visibility of malicious content. No scripts were extracted, but the overall structure and redirector URL strongly indicate a 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.cc/pify?keyword=brian+tracy+sales+management+pdf
    • http://mikag.mmtaxilimo.com/uploads/1/3/0/7/130776131/4bb86fd1.pdf
    • http://files.district13masons.org/uploads/1/3/2/8/132814050/1338133.pdf
    • http://tewox.zerobytescomputers.com/uploads/1/3/0/7/130775734/nelazevugaxa.pdf
    • http://files.theriftny.com/uploads/1/3/0/7/130776607/rabunusibupivamitu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/1152/1187/files/ffxiv_shadowbringers_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/77862396483.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8349/files/vurikupoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/taselalodomojobuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/acupressure_points.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5811/files/zuzegibebopozolazi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/sajaramuvilatodonuwoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4502/7993/files/jodomamogodutoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2117/9816/files/97686813413.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/duxerajojagoraxobewas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/weather_rio_rancho_nm.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/bagigerisipimikotekit.pdf
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/36436449512.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_off00009c38.bin
9c9291604c79a672e8e8e01d32b28216c94206c63a6443500a70733d7ccd1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C38 5304 bytes
font_01_sfnt_off0000ae2b.bin
ced3f8dc8aa2c595fd5a64e54791f4ab9f3655b145c22a5296a966325cf5b196		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2B 10404 bytes
font_02_sfnt_off0000d17d.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17D 4324 bytes

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