Malicious PDF — malware analysis report

Static analysis result for SHA-256 380d4fcf576652a0…

MALICIOUS

PDF

51.4 KB Created: 2020-08-22 03:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0898783e5e81d814103c9d9e46999d8d SHA-1: 4bf8c8dbf267bd905b519c07a433e48f5fbf3d46 SHA-256: 380d4fcf576652a0e00c2d5735305a6ae2ae5c81fb2927dc06fb5723d8fe2c3a
152 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring users to click on these links, which likely lead to phishing sites or further malware downloads. No scripts were extracted, limiting the analysis of direct payload execution.

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.ru/pify?keyword=bye+bye+love+ukulele+chords+pdf
    • http://files.aeneidusc.com/uploads/1/3/1/8/131856907/mized.pdf
    • http://dixax.northidahocasa.org/uploads/1/3/0/7/130739309/lovek-poferurepuruju.pdf
    • http://files.stahlbushap.com/uploads/1/3/0/7/130776088/bisudexolanivu_farotabezopaj_kenezojukonibig_xofimemuda.pdf
    • http://files.latinfestival.ca/uploads/1/3/1/3/131379639/fazolujiwepabud_tewezuxe_xipusobil_muduwimadedo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/kusativo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0333/1231/files/dental_hygiene_cover_letter.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/catharsis_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0427/7560/9510/files/31846564397.pdf
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/merge_word_docs_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/causas_y_consecuencias_de_la_contaminacion_atmosferica.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/61665727613.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/vozedugopinixi.pdf
    • https://cdn.shopify.com/s/files/1/0446/6769/9353/files/basics_of_hindu_astrology.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/34766922064.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/ruvape.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006986.bin
2aa0e58eb3dfe13c46c34fc1928d68986de02a27525c3b11dddda02e1793b9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6986 5448 bytes
font_01_sfnt_off00007c15.bin
bba83f35850388b7ab0104ef2b1577f881cb181a842fc16be21e22a408c7deab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C15 15244 bytes
font_02_sfnt_off0000ab65.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB65 16204 bytes

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