Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c79ad82b36ff3ee…

MALICIOUS

PDF

44.1 KB Created: 2020-08-20 14:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 657b90a52c77042b4e38b429a7e82324 SHA-1: 9f59e202cbc6cd176a650ac8d6483e2522277439 SHA-256: 5c79ad82b36ff3ee3672941cac7e0e52aad3d7636d8fb6a1e0f4d26563cb456c
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports the lure of a malicious download. While no scripts were extracted, the embedded URLs and the PDF structure indicate a malicious redirection workflow.

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=basara+2+heroes+di+android
    • http://pimirub.thrilltheworldaustraliamelb.com/uploads/1/3/0/7/130776791/foluwuwezokonaz-muxujovadoragi-jizanisogoxafa-puwinifojumipam.pdf
    • http://files.heartsinbalance.com/uploads/1/3/0/7/130775970/bijed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/9448/1821/files/volenav.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/kutigerajig.pdf
    • https://cdn.shopify.com/s/files/1/0434/7700/8548/files/adventure_travel_trade_association.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/kivizunufese.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/story_of_an_hour_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2084/files/92624241554.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/euro-_pro_sewing_machine.pdf
    • https://cdn.shopify.com/s/files/1/0435/2986/3323/files/bisuwaxixowitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/jajuraworijepusofesev.pdf
    • https://cdn.shopify.com/s/files/1/0448/4576/0669/files/mainsheet_blocks_lewmar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.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_off000054ee.bin
d2fb27f4afd3d72534590b0712a4acae62b52683d241e5569d7b505141d8ae18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EE 3288 bytes
font_01_sfnt_off00006099.bin
6851a779f6766d0463a1d0faaa3b5ba33422987fe397969695bc8f0f71c58ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 4768 bytes
font_02_sfnt_off000070ad.bin
76557325205308b9c0b28bfdb3a505571b747c39ee57d37e0a1c330355b80e43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AD 10272 bytes
font_03_sfnt_off000093c0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C0 4324 bytes

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