Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e195e29570f0b3d…

MALICIOUS

PDF

52.4 KB Created: 2020-09-19 00:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c2660d3955cd5248cec4af2e4424f4e SHA-1: 05a410d577a62973dd85b6357fa963aec5644603 SHA-256: 7e195e29570f0b3d31a5173851083d5ff4c5e7f9e8890124aa63b91017ab2e0d
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to multiple external websites. One of these URLs, 'https://ttraff.me/wix?keyword=nefarian+guide+hearthstone', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to lead users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.me/wix?keyword=nefarian+guide+hearthstone
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://59c30a18-cae7-4510-bfcb-c8683704ed73.filesusr.com/ugd/1c8c1e_0d43d8af7d004c2cb0ee2b7c4004b525.pdf?index=true
    • https://58041088-f47c-4eff-ae11-dc9c26d813be.filesusr.com/ugd/58a813_ed6f2e01aee04baca3e87706df5e0d12.pdf?index=true
    • https://aa2cdac8-3c2a-4844-a565-4f8bd8b983ab.filesusr.com/ugd/8ac1ab_66385d70a4da408fb56f9069677ea539.pdf?index=true
    • https://4c7b1abc-740e-4e52-842d-0d5152cb4c1a.filesusr.com/ugd/d55797_a336e3fdb4fe490fa1404eb525c7e225.pdf?index=true
    • https://c42f6aba-85c8-48ac-91bb-8c78e259b953.filesusr.com/ugd/6fd45c_9a538e73cf894b6498adf1bf205ad26e.pdf?index=true
    • https://aea385b1-978c-46ea-a893-fd1f0e626fcb.filesusr.com/ugd/d94ae5_d62b783c9170450aafefed75cf210ee8.pdf?index=true
    • https://6ff669de-0f95-4e17-84bd-23d3272f3702.filesusr.com/ugd/d2cc1f_a9c513eac75f4b7ca47656c55e8a282a.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/ditilew.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/girapesuxivaxaga.pdf
    • https://69de69ae-065f-42f0-9def-5b8fcd4525e6.filesusr.com/ugd/80fd5d_6941651001d84ad8834c271cdc36c8ba.pdf?index=true
    • https://0cbeab6e-4304-4462-8e19-440cb55feb68.filesusr.com/ugd/d7d6cd_94b5a57ae946413cb7eab67bc865d2b1.pdf?index=true
    • 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_off000083a4.bin
75a1ff6507c48e149b39ea2a8b1be8c33cc4b96c6a00b00801763de22bd8e99d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A4 4988 bytes
font_01_sfnt_off00009493.bin
2f34281896836f5ff3ae8366f8dd4a4ea158fa0bbff2ab7850322a658104189c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9493 10168 bytes
font_02_sfnt_off0000b75e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB75E 4324 bytes

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