Malicious PDF — malware analysis report

Static analysis result for SHA-256 00aaa55e386b11ec…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 17:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7842484a364876b42579579444111252 SHA-1: 73dd141c65006f2b3e27f3725ddd81038d7919a7 SHA-256: 00aaa55e386b11ec999c9f4517b64fa44a7e29cd39eac70042165b741e15a71d
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristics. The primary malicious indicator is the presence of a link to `ttraff.com`, which is known malicious infrastructure.

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/wix?keyword=calligraphy+practice+letter+sheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/bb13a2_41f15140d8cd4c598aa4d0ee837de163.pdf
    • https://static.usrfiles.com/ugd/22739b_5ef705f01977490fb6f1d679559207ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_75af4c98b558483ab5b7d42cc283ab75.pdf
    • https://cdn.shopify.com/s/files/1/0436/4081/5774/files/animal_gestation_game_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1599/files/28444181654.pdf
    • https://cdn.shopify.com/s/files/1/0435/1341/3791/files/mizafed.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/magazine_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0464/1357/8408/files/alt_j_in_cold_blood_binary_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/4929/4756/files/autodesk_revit_basics.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/fivatobaxij.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_off00006348.bin
aa9722cb148e6540ea99eb83d8b0b2e16c03d772b4aa605a0262f879d3d41f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 5204 bytes
font_01_sfnt_off000074f9.bin
83d091a693a30bf8a45fdaac10afc8c2407e60b8ba862f3b07a494696e7a708c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F9 10276 bytes

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