Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf15f4f3f3802d6b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-31 08:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 240c2926245f420fd1c95a116e3a4ae2 SHA-1: 258a67bf3e4362f4b1b071caa8202568bd38373f SHA-256: bf15f4f3f3802d6b271f2c96cf20a4a1157e9f7b3aa5b267806e78279cbdad3d
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link, 'https://ttraff.com/wix?keyword=bonavita+metro+lifestyle+crib+instru', is flagged as a redirector to malicious infrastructure. While the document body is heavily obfuscated, the presence of numerous links, including the malicious redirector, strongly suggests an attempt to lure users to harmful sites, likely for SEO poisoning or phishing.

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/wix?keyword=bonavita+metro+lifestyle+crib+instru
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/incest_sex_cartoons.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/ap_grama_sachivalayam_digital_assistant_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/introduction_to_bayesian_statistics_bolstad_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/fipuzoxizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/32729865005.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/54009859020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/opposite_words_worksheet_for_class_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/sodapafejidurimisagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7295/files/3m_tape_machine_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0438/2877/3021/files/vupob.pdf
    • https://static.usrfiles.com/ugd/10e3af_17e54fd6b37e46b092f5b3bdbcc0120c.pdf
    • https://static.usrfiles.com/ugd/b8c837_38708ea07c0845c2a202dda7ae14a2e3.pdf
    • https://cdn.shopify.com/s/files/1/0433/2109/8408/files/cours_sur_l_afficheur_7_segments.pdf
    • https://cdn.shopify.com/s/files/1/0434/3011/7526/files/26818916658.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/40951413756.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/wiwamapofewosamatedabu.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_off00004fda.bin
f2704761cc318b8a3ed6f018233f2638330e1876b3acc215c27903c9828d463d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDA 5380 bytes
font_01_sfnt_off00006214.bin
4b45db9f0e0153d8903ae8f9b8a71ce1f03226ae16d43694bb427502895dcbc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 10152 bytes

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