Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46c32f222374989…

MALICIOUS

PDF

38.2 KB Created: 2020-08-18 22:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10f8d6b03363a43cd0a253844562778a SHA-1: 54be82253adceaa1b2b9711ba94c23fb52757e93 SHA-256: e46c32f2223749896f8f1fb7555b067c92dd03c4584705f2dc164d9530aa635e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with the primary URL pointing to a redirector service. This suggests a phishing or redirection campaign designed to lead users to malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links, including a redirector, supports this assessment. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=seinfeld+george+answering+machine+song+lyrics
    • http://files.allenhuang.org/uploads/1/3/1/3/131380052/5e13bdda91e1.pdf
    • http://files.jaynardiscounts.com/uploads/1/3/1/6/131637385/1755616.pdf
    • http://files.neworleansartreview.org/uploads/1/3/1/3/131378897/wapamaz_bebufuwesa_fexapil.pdf
    • http://files.ectorbaptist.org/uploads/1/3/0/7/130739746/gogizofa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5891/3689/files/32873651413.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/affairscloud_current_affairs_weekly_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/xapidokafebibedala.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/5412120553.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/56122501412.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/35508339457.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/ky_lake_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/differential_geometry_and_topology.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/79677438392.pdf
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/totipamutoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/9714/4990/files/36031069205.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/bomuposatevij.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/goal_ii_living_the_dream.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_off0000491c.bin
1ed6e80ba750efebfff141239fbdcf4965caa26dd6b884990407e1f2b7f9ae3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x491C 5440 bytes
font_01_sfnt_off00005b72.bin
2f420353653b999295e4d35ac37765ebaeb7c9a4bbf01ee0f8b50daf04750727		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B72 9896 bytes
font_02_sfnt_off00007d65.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D65 4324 bytes

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