Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f27b54dced79c0…

MALICIOUS

PDF

42.9 KB Created: 2020-08-26 09:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bde2444a3736cdba6a3d828e88c68e SHA-1: db27cc1126e774cb33f38a1c4c208ab52e87cfc1 SHA-256: 05f27b54dced79c0321f3855ade61cd1d655456a8d6dc418b7ec8b5129727ad7
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=ps3+sacd+ripper'. It also exhibits a PDF link farm heuristic, suggesting an attempt to distribute multiple malicious links. The presence of a 'Download Button' heuristic further supports the lure-based attack pattern. While no scripts were extracted, the embedded URLs and heuristics strongly 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=ps3+sacd+ripper
    • http://zezen.reisebazar.ch/uploads/1/3/1/6/131636947/vojobotukup_lujudejebovi_nomosujibebev.pdf
    • http://files.themarketon4th.com/uploads/1/3/0/8/130814216/luzeripu_vinetixaribew_sapomaraj.pdf
    • http://files.thegianninibeacongazette.com/uploads/1/3/1/4/131438161/4148569.pdf
    • http://files.hullabaloomusicfestival.com/uploads/1/3/2/7/132740415/zikomigop.pdf
    • http://robituxug.mindbodyink.com/uploads/1/3/1/1/131164250/bijazobor.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/gramatyka_jzyka_angielskiego_w_piguce.pdf
    • https://cdn.shopify.com/s/files/1/0435/4159/4266/files/1918067014.pdf
    • https://cdn.shopify.com/s/files/1/0430/9745/6801/files/gopeboludefolusifojowulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/7796058483.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/android_activity_class_source_code.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/susemajowisebim.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/49213951411.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/70899537207.pdf
    • https://cdn.shopify.com/s/files/1/0430/6767/0689/files/marathi_to_english_barakhadi_chart_full.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_off00006a3d.bin
ca640071bedd7ecd46a4e4fbdd199f1a99b7ee7c93e6da7bac52ade99fc70221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3D 5200 bytes
font_01_sfnt_off00007bea.bin
9e9bba9b16c44016a7792f0a1006263931e6b024f8d2c3f8957a1b00dbe78852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 10132 bytes

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