Malicious PDF — malware analysis report

Static analysis result for SHA-256 66ccdc330d045cd8…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 12:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51ab1d9de1118eb598e19014b06c1eec SHA-1: 622af7c5b807707c4ca2abb75813476ec3b6fce1 SHA-256: 66ccdc330d045cd863d013cfeb2abd529c44099f668cf1b37a46183cfd53a254
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics, suggesting a coordinated effort to drive traffic to malicious content. The presence of numerous external PDF links further indicates a link farm strategy, common in SEO poisoning attacks.

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=customary+law+marriage+in+zambia+pdf
    • http://gajeneba.goldenehausnummer.com/uploads/1/3/1/3/131384169/punipaneze.pdf
    • http://files.alfaknife.com/uploads/1/3/0/7/130775197/xipupepopus.pdf
    • http://files.josephafogiato.com/uploads/1/3/0/8/130813846/kiluwu_fejolexavafos_neziluluror_zexem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9290/2039/files/44905272062.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/61646764499.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/adobe_to_word_converter_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0440/2659/3445/files/nesedajevunamigovula.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/woxetavilirolesobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4080/files/ethical_hacking_books_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/pomunuvusejifaxudefuvam.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/advantages_and_disadvantages_of_social_networking_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/kadatodazarulumu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0432/8515/1897/files/14118670023.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/27424603183.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/59760668792.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_off00006a30.bin
ee30f4fbf637c9b53e24c27bec2644fa8d1014b835d5eacbd9382242eb925e73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A30 5652 bytes
font_01_sfnt_off00007d69.bin
5d8b3e750dcb7737d465a8be80bd234c7d73a742129530ed3f99f9216ebdeab8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D69 10100 bytes

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