Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fc23e7b3b66da5…

MALICIOUS

PDF

60.5 KB Created: 2020-08-19 09:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 308c945d3809483c1f0ddf115d3d7933 SHA-1: aeded85bf9c88b734d32706f724efcbe76109105 SHA-256: d5fc23e7b3b66da555f946673e47e1711ac43b087f85d41315465c64f4846e5b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing an 'onboarding template' and includes the malicious URL. This suggests the PDF is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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=onboarding+template+for+new+employees
    • http://buleg.shipleyartstudio.org/uploads/1/3/2/6/132681670/cf0c407f56e.pdf
    • http://files.cornerfrenchcottage.com/uploads/1/3/0/9/130969237/poremasawadox-jaset-tumen.pdf
    • http://files.samrossman.org/uploads/1/3/0/9/130969614/wifaw.pdf
    • http://rufateg.kangatrainingcaboolture.com/uploads/1/3/2/6/132696030/volez_lemawidowugexe_fugiregesiv_zolufula.pdf
    • http://vavulij.monuem.org/uploads/1/3/1/4/131438175/gojifibu-zupazadumumo-nikurexa-xaradebapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdf
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/killington_snow_report.pdf
    • https://cdn.shopify.com/s/files/1/0444/5736/1575/files/bansal_classes_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/21205016726.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1144/files/rizofamexega.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/25187478216.pdf
    • https://cdn.shopify.com/s/files/1/0435/1413/4692/files/55042522926.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/keferejenela.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/files/lamojebazupilujuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/77107972226.pdf
    • https://cdn.shopify.com/s/files/1/0433/5098/2805/files/wipezuguxego.pdf
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/bilbo_s_last_song.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/xufedasexafaze.pdf
    • https://cdn.shopify.com/s/files/1/0435/2291/6520/files/jipolapokawenatapo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/42735261537.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/
    • https://cdn.shopify.com/s/files/1/0434/3103/5032/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a22a.bin
3519cb3d22d39a6c6351074d0ce1d3b2b85aee1199da65fce0faa88c3c7fc95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA22A 5724 bytes
font_01_sfnt_off0000b58e.bin
8770a9d16f6ec8ed1e04f7f31595c1fd3834ff76ff6f55291086ab87d6d749e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB58E 2268 bytes
font_02_sfnt_off0000bfa0.bin
bf4b82f414d7bfef36d38b06accecab944d85047db049645777676ee1effc731		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA0 10572 bytes

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