Malicious PDF — malware analysis report

Static analysis result for SHA-256 3beac6b940e42893…

MALICIOUS

PDF

48.3 KB Created: 2020-08-04 10:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f77387eb8a3aaef060ab9ab025d4442 SHA-1: 834c105228dd14b2faf7ae1c2afffae5854a7888 SHA-256: 3beac6b940e42893e2df475878dd0bc5237f336adf31827e25b380e4bc0ea7b0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF document contains a malicious redirector link disguised as educational content. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing indicates that the embedded URL 'https://ttraff.com/pify?keyword=sociology+notes+class+11+pdf' leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm designed to manipulate search engine results, likely to distribute malware or phishing content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this file.

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=sociology+notes+class+11+pdf
    • http://files.downsideupphoto.com/uploads/1/3/1/4/131407178/3524040.pdf
    • http://files.purpleinkpublishing.com/uploads/1/3/1/4/131437844/mikofoxaxomojope.pdf
    • http://files.gbresources.org/uploads/1/3/0/7/130740517/27271a5cbad5.pdf
    • http://jebaziki.diminexnz.com/uploads/1/3/2/7/132740435/dagejuvurije.pdf
    • http://files.purpleinkpublishing.com/uploads/1/3/1/4/131437844/mikofoxaxomojope
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/nojiwarumedom.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/briggs_and_straton_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/tutinabagudexoguritaboras.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/64858142512.pdf
    • https://cdn.shopify.com/s/files/1/0436/4831/9638/files/jibogeterozemasowejez.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0455/files/sakowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/sefeve.pdf
    • https://cdn.shopify.com/s/files/1/0434/3539/3180/files/kerugekobujisorexipo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/physically_based_rendering_from_theory_to_implementation_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/30342897792.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/totanipimozix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5027/0869/files/letofanal.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2950/files/vipodutolagodasaban.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_off00006f30.bin
543f1729d2032e73b99acf5823e2eb946a7ad9ce662d142ab87e4b3eb61dd164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F30 5272 bytes
font_01_sfnt_off00008132.bin
6b9980394039eb460f750954deed65476dd0a200c31281e1f4f638463fa7e1a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10700 bytes
font_02_sfnt_off0000a58e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58E 4324 bytes

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