Malicious PDF — malware analysis report

Static analysis result for SHA-256 d992263f6ae4476c…

MALICIOUS

PDF

34.0 KB Created: 2020-08-24 18:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab9294b3fd9f4de872ca198536bbe992 SHA-1: 880a8953ac340dddce3aee5434aeff8ba15e94f8 SHA-256: d992263f6ae4476c7452a8deb18af51ae087fd1bb9fe8c28814a2a1fb6c91757
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm'. The primary malicious link, 'https://ttraff.cc/pify?keyword=arvind+akela+kallu+song+2019', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the song title and the authoring application, suggesting a lure to disguise the malicious link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=arvind+akela+kallu+song+2019
    • http://milux.greenforestzambia.com/uploads/1/3/2/6/132682883/d15593c5b0.pdf
    • http://nuxok.lazuliliterarygroup.com/uploads/1/3/1/4/131407197/1527323.pdf
    • http://navew.taiwanhotelnews.com/uploads/1/3/0/8/130813714/pumenixuwifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/pair_birds_photos_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/93353274389.pdf
    • https://cdn.shopify.com/s/files/1/0429/6831/8105/files/lupimorudarewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/mitsubishi_lancer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/go_math_workbook_grade_8_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/rca_universal_guide_plus_gemstar_remote_codes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/xojofobixesejakotelegeku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0092/2261/files/89006156867.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046e3.bin
a2099acd6bfb62088484da16b2fb8c0d8f2926628f7e69e39eae78259fddc482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E3 5588 bytes
font_01_sfnt_off000059f4.bin
fbb809085d620df64cf5adca2f3c4837925e34ca62f79ec546f0dae41368ed5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F4 9816 bytes

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