Malicious PDF — malware analysis report

Static analysis result for SHA-256 1173545bee2a2319…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 13:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6c76c8286b1583416d61bfaa3e4a536 SHA-1: 517072a7e20133f07553c4a14a86b3e96baa40fb SHA-256: 1173545bee2a23199abeacf5877175ffb992846263ef00323c870e8005551221
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains text suggesting a lure related to 'quantitative data analysis pdf' and a download button. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the link farm heuristic indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=advantages+of+quantitative+data+analysis+pdf
    • http://files.irondequoitartclub.org/uploads/1/3/2/6/132696044/gawetexenanus.pdf
    • http://baxuna.scottpruysers.com/uploads/1/3/0/8/130874493/6057321.pdf
    • http://files.sunnylifecoach.com/uploads/1/3/1/3/131379277/bf59b752cdc.pdf
    • http://files.fundacionchelaquintana.com/uploads/1/3/1/0/131070394/f229552e8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/autodesk_revit_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/nasamot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2886/4409/files/48591142377.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/how_to_make_grass_grow_in_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/renuxilixetupimoladufiwu.pdf
    • https://cdn.shopify.com/s/files/1/0448/4608/8349/files/ricoh_aficio_mp_201spf_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/pdf_download_case_files_obgyn.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/as_built_survey.pdf
    • https://cdn.shopify.com/s/files/1/0437/8407/7473/files/givuzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/56680524763.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/buniluniniwetaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/wavojirixap.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_off00006c13.bin
0e4b1cae7016a0ad1fd54456d9a18f6c85f9c48262fd7e445b09b8efa536669a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 5392 bytes
font_01_sfnt_off00007e8c.bin
3e2fcae31a9254c889e71175aca342f7daaf61755d72fc78f7df46fe34ac5bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8C 10604 bytes

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