Malicious PDF — malware analysis report

Static analysis result for SHA-256 63684afcf08b7c10…

MALICIOUS

PDF

61.2 KB Created: 2020-08-29 19:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2833b39bc903fa2889e6e48b9048b8 SHA-1: dab8b8a53322a4e208597b76904c1a0fe969c1f8 SHA-256: 63684afcf08b7c101bc07e4610526788e2bb85f7c3dfe6d394f73cad7d0fa0f8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is ttraff.link, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and benign-looking PDF files, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted, but the presence of numerous links and the ML classifier output strongly indicate 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.link/wix?keyword=windswept+house+galveston+texas
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ad796a46abf149ef8058e49501923ca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_11e581ef13624aa7a70b29450cc945d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed5ff982e8504dd98857a5e5da02b28d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d111c0e31f545549e6df551deddc367.pdf
    • https://static.usrfiles.com/ugd/b8c837_09ba5eaabece408292facf589dff1e0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d9c1b7c5fdc412f8793aac7ea0c75cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_54a8aafbb542419fa5888ecb6c672759.pdf
    • https://static.usrfiles.com/ugd/19103d_6d401119e2aa4ed09d8b034d48a7d786.pdf
    • https://cdn.shopify.com/s/files/1/0435/0817/0918/files/zevixibotoxuwigog.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/non_uniformly_accelerated_motion_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/8479/9383/files/mubof.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/teragavujulusoxapaso.pdf
    • https://cdn.shopify.com/s/files/1/0438/2559/4530/files/76346480355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/xafujorebapal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/activar_office_plus_activar_office_plus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1042/3960/files/rovudadusito.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/remedial_definition.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b087.bin
0081c08a20a0f4bc842da106bd6737c498c56d8404a79ddf8addd00ca08ea4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB087 5360 bytes
font_01_sfnt_off0000c2de.bin
ffd8eddbe6eda5e288de242fa38ae1a9e35c17bc2ad5108b2e60d469125b36a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 10816 bytes

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