Malicious PDF — malware analysis report

Static analysis result for SHA-256 251139c3467b9a0f…

MALICIOUS

PDF

46.2 KB Created: 2020-08-03 08:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0b676e8a6979b1043cbf3562272d769 SHA-1: 1445abdedf3086470f159c4945db8b928bde825e SHA-256: 251139c3467b9a0fc9e0727ca91b1de0ce6e956783f574ec188cebbe0d21c946
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and other PDF links, suggesting a lure to external 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/pify?keyword=classic+hunter+pre+raid+bis
    • http://files.ideallyfreely.com/uploads/1/3/2/7/132712233/sapokinovep_lanipazoditabaz_fijulakubewoxej_zafesosusofav.pdf
    • http://files.hamptonlodge204afm.com/uploads/1/3/1/4/131406781/mupekuxex.pdf
    • http://files.cmc-tam.org/uploads/1/3/1/6/131606060/xufukilaxovazetudonu.pdf
    • http://files.mickytmope.com/uploads/1/3/0/8/130813409/tizubanavusasag_solajexo_nokebur.pdf
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/91334732844.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/inheritance_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/77776593869.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0439/files/tojadizowas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0797/5335/files/85683889082.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/45264834832.pdf
    • https://cdn.shopify.com/s/files/1/0432/5828/2152/files/api_510.pdf
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/49171191967.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/10905554067.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/tusewusarojisopazisojawe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069bc.bin
0a816be49f8c968ef3f5b22eadffc6c862a7550f85cd076c9dce0e792cc93574		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 5096 bytes
font_01_sfnt_off00007af2.bin
528a3ec6e70b58a8a5fb3725588da4a73fbc96e468e7fb72df2308462acc113e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 10264 bytes
font_02_sfnt_off00009e09.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E09 4324 bytes

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