Malicious PDF — malware analysis report

Static analysis result for SHA-256 7da633870665e5b0…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 00:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 159efe3d213b545406749c88a3d93744 SHA-1: 400487b804e8bbaf2904c526228d04921d37756a SHA-256: 7da633870665e5b07d8962f48e50b0386efb632261cb4e35c4fc10f84278fa36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a video song. This indicates a phishing or malware distribution attempt. The document also hosts a large number of external PDF links, suggesting a link farm for SEO manipulation or to obscure malicious activity. No scripts were extracted, but the presence of malicious URLs and the ML classifier output strongly suggest malicious intent.

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=cg+love+hd+video+song
    • http://files.sherconresort.net/uploads/1/3/1/0/131070485/fowexunalolefupad.pdf
    • http://larapu.robertjcarroll.com/uploads/1/3/0/8/130813821/ab0702437a.pdf
    • http://files.belluccisrl.com/uploads/1/3/0/7/130739204/nemopazisud_nejerajuxepor_toxepef_boxakekisepu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/ibpsguide_free_mock_test_sbi_clerk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/9771891253.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/49432489840.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/adams_essex_calculus_a_complete_course_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/0388/5206/files/84018797408.pdf
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/formal_wear_online_canada.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/faxojowoletuvifawudisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/51187673684.pdf
    • https://cdn.shopify.com/s/files/1/0431/0804/0853/files/gajuganiluwimupoxomepa.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cc5.bin
9a22af8abaf82cf333afa6543ef051ae06714786f5609bb4a94e3571022264c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC5 4744 bytes
font_01_sfnt_off00006cf3.bin
9f76fd6bc7c18a6a6f61658fe4d4c0f2679f91e39228b89508532a487dee211b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF3 10388 bytes
font_02_sfnt_off00009084.bin
546e3979a1f4c9ad88d0ad04bb9a7d86a50ab55747bb4811eb47dee860e17337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9084 7212 bytes

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