Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cf658c5e868dc2…

MALICIOUS

PDF

46.2 KB Created: 2020-08-09 06:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8bb77202bb01b57f6d575608be4f1c2 SHA-1: 71a0a059de09645dfcd1d514602639c5906acea0 SHA-256: 78cf658c5e868dc23d4195584677a24f2057a1c4e8b965a4d57496e0c7232e11
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick the user into visiting a malicious site under the guise of a seminar PDF. The presence of numerous external PDF links further supports a link farm or redirection tactic.

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.com/pify?keyword=sixth+sense+technology+seminar+pdf
    • http://files.tianabridalcollections.com/uploads/1/3/2/7/132741241/88c1dc6.pdf
    • http://files.joycebrienzart.com/uploads/1/3/1/3/131380480/4837050.pdf
    • http://jolurinel.1love-sos.org/uploads/1/3/2/7/132741555/furewexiwedotin.pdf
    • http://files.ruiqichen.info/uploads/1/3/1/6/131637853/92dada48.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/29477287466.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/gemstones_of_the_world_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/auto_mechanic_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/wogakexanezemuderenol.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/64802848454.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/great_smoky_mountains_national_park_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/gefizik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/23869897890.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5845/files/xcode_11_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3846/files/28921629716.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/wafipapotaxetin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7637/files/algebra_1_volume_2_teacher_s_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2802/9345/files/litizuborodamesoxufa.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_off00006a21.bin
109a390e9bfcbdace02f0e6edcf44606a01b06dba82ce99afe4d4c1764863642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5840 bytes
font_01_sfnt_off00007de1.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 1800 bytes
font_02_sfnt_off0000866e.bin
f677f3f1e94820fd9ac6b0ffa9c88269d0c15319ff56c1b0e34902e37dd5a2fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x866E 10792 bytes

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