Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0aeed5f7737e029…

MALICIOUS

PDF

44.7 KB Created: 2020-09-17 03:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d827aaea9f639c4faaa92dbd84f980 SHA-1: 1ee3d508020ff3188dbcb9bd606784db415cd163 SHA-256: c0aeed5f7737e02942d00162f10aded986b3ec230765b042c7afed9c9a7792e6
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=last+shelter+survival+apk+mod+ios'. This URL is likely intended to redirect users to a malicious site, possibly for phishing or malware distribution. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=last+shelter+survival+apk+mod+ios
    • https://3f3bf6fd-0078-493b-9dec-dcd3d6d9aece.filesusr.com/ugd/c83fdb_a1d0a8151ba646d8a889c04ef9bfb601.pdf?index=true
    • https://6711d6c1-39ce-4016-991b-a76289b985a1.filesusr.com/ugd/f515ca_ce592003f89d4aa586be944e6400e9ea.pdf?index=true
    • https://04cb7ade-8699-4b1e-a837-1d608fc65977.filesusr.com/ugd/71fd01_b6fa21c0ef6f43ccb17e4a6bdc4f8926.pdf?index=true
    • https://37da5d68-0f16-41a3-8565-8b0701101630.filesusr.com/ugd/8acad3_0e529c1c10e943ec8b07085befa5e903.pdf?index=true
    • https://ec8c1ecb-4c87-4807-b1dd-65a90b869df1.filesusr.com/ugd/89064d_10709abdd53f4e83b4b3013590ee4609.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0457/3734/5180/files/54537204474.pdf
    • https://cdn.shopify.com/s/files/1/0431/5801/2068/files/hanukkah_worksheets_grade_2.pdf
    • https://3d291620-cbfc-48f5-82ed-413ce812bdcd.filesusr.com/ugd/1a89c8_12f313d0d5f34dd7b266d80fac877713.pdf?index=true
    • https://82fa63d9-1033-4dd3-95ad-e2c6507e2b61.filesusr.com/ugd/4c1554_5cfde8ad0032414f9814c7cebe0b1066.pdf?index=true
    • https://7fbeab49-e59c-4c00-8ff8-780dc91db50a.filesusr.com/ugd/7cefa9_68a728f934ca406aa8d9dc632719708c.pdf?index=true
    • https://2c3ace21-ece0-4f8b-9232-fd35f69f4fce.filesusr.com/ugd/e643da_3afdd5fe245c4560a315c3339502db79.pdf?index=true
    • https://d81368f9-8d24-4254-8042-6fc9c1269551.filesusr.com/ugd/77941b_afd48d4a5084475db025b7c51c3849f3.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/xisozujobupabalu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4703/files/html_to_converter_asp._net_core.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5480/files/42485140661.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/
    • https://6711d6c1-39ce-4016-991b-a76289b985a1.filesusr.com/ugd/f515ca_ce592003f89d4aa586be944e6400e9ea.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fcf.bin
972cdb780318781b1ebaba706a077b3f77a8cf1a83e6f9e96485aef5b21afaac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 5264 bytes
font_01_sfnt_off00008195.bin
27880456f3061f4dedeae4b1c8832da97892e289b29a35d505b0d2a18fec5985		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8195 10528 bytes

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