Malicious PDF — malware analysis report

Static analysis result for SHA-256 e145d6a31c4ea158…

MALICIOUS

PDF

48.4 KB Created: 2020-09-14 01:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5fa40c7cb6471027a060da25747b343 SHA-1: ab5169583f200dc299ce17ca635183eef5f44758 SHA-256: e145d6a31c4ea158be944729bd53dc5c46a3027ec853895c8c98008c151e40fc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. This suggests the document's purpose is to lure users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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.link/wix?keyword=der+besuch+der+alten+dame+interpretation+pdf
    • http://files.garrettvandekamp.com/uploads/1/3/0/7/130776272/8150545.pdf
    • http://negoli.roswellnorthmusic.com/uploads/1/3/2/6/132695543/rogan_movub_jijujuzerir.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9920/files/la_esperanza_estado_de_mxico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dipipopiluniwewikojidil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/23415878871.pdf
    • https://cdn.shopify.com/s/files/1/0438/4587/7922/files/vurevun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/webusowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/eccentrically_loaded_foundations.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/denef.pdf
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/tamil_thriller_movies_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/5041/6793/files/precalculus_a_graphing_approach.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/jalafumepuzuwofezixefode.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_off00007d0d.bin
b6391387ade893068916de578b94a9c87280a9e2fe37826667bda19dadfdbe5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0D 5532 bytes
font_01_sfnt_off00008fb0.bin
878369b40852df2120bcffac3caac438a6ef17956953f9be6b4b19247dc44a0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB0 10704 bytes