Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b7706c4a0ed867…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 07:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23b01757ee2a7834cfae81852b17880e SHA-1: d28746c498c9096a92d97b47fee5bfbd3895d154 SHA-256: 85b7706c4a0ed867b8593cbd03d1ae0b94185247edee4cea75b6ac9265f06451
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a redirector infrastructure. The primary link directs users to 'ttraff.com', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a phishing or scam attempt disguised as academic content.

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=corporate+finance+ross+westerfield+jaffe+10th+edition
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0256/8609/files/lusibuvabuwujegibexol.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/blood_glucose_guidelines_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5355/files/lowovij.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/52385640246.pdf
    • https://cdn.shopify.com/s/files/1/0449/2250/3323/files/business_english_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/tidikirogekikom.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/tata_starbucks_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/globo_reporter_noruega_completo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/47269697546.pdf
    • https://cdn.shopify.com/s/files/1/0458/1163/0246/files/22468996497.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/chadderton_reform_club.pdf
    • https://static.usrfiles.com/ugd/b8c837_61aa954e9a2c416e8cf530f4bbf5c2ce.pdf
    • https://static.usrfiles.com/ugd/affb4a_21e134e9ce474bea9ddb12f5f1c4cd54.pdf
    • https://static.usrfiles.com/ugd/e73fea_f2292b511d6242a9a7636cda79629830.pdf
    • https://static.usrfiles.com/ugd/b8c837_1194370f7fe24c9aae7dbc812492f2fd.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c2a.bin
7a4d0e1e406f35e361bbc0502d1523b1587799a594c5372269166945addf34c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2A 7392 bytes
font_01_sfnt_off000064d4.bin
aa21713f737262822b69b5117f16a66860c7673d3462e5868b29ca82465b6510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 5416 bytes
font_02_sfnt_off00007749.bin
314396597967296d659a914f52f3fb06a8140b124e7395330507f86f6db37431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7749 10160 bytes
font_03_sfnt_off000099f8.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99F8 4324 bytes

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