Malicious PDF — malware analysis report

Static analysis result for SHA-256 789c771f44fa527a…

MALICIOUS

PDF

44.4 KB Created: 2020-08-08 00:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb0c9ee96fc51ca782fddf69599bc64 SHA-1: dc65906fc8894c0ecf9dbf95420a503e6b33e7d2 SHA-256: 789c771f44fa527a236b52c42e2a8c3197eaf93f32ba417cf8ed85435f567bc5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate document downloads but ultimately redirect to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=boiler+feed+water+pump+manual+pdf, which is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=boiler+feed+water+pump+manual+pdf
    • http://files.deshlerchamber.org/uploads/1/3/1/4/131438641/zedetuzikobapiwaxo.pdf
    • http://files.resortattractionsllc.com/uploads/1/3/0/8/130814124/lisoliw-tapix-vuxutag-dajam.pdf
    • http://files.gerrycooneysba.com/uploads/1/3/2/6/132682585/rakuvafubo_kotufafaxex_fofesezode_xavudalirebot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/baseli.pdf
    • https://cdn.shopify.com/s/files/1/0429/5596/4569/files/73714253400.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/chuck_lorre_vanity_cards.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0490/files/60453197729.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/teluluritevuzubib.pdf
    • https://cdn.shopify.com/s/files/1/0429/1801/9235/files/computer_hardware_and_networking_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/vikulabebokipixaxesotuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/1031884273.pdf
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/39391620587.pdf
    • https://cdn.shopify.com/s/files/1/0437/6467/8817/files/37563486694.pdf
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/35753438020.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/gogutojemigizufexisoma.pdf
    • https://cdn.shopify.com/s/files/1/0440/1872/9110/files/sir_arthur_conan_doyle_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/sifomerimijozem.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a6.bin
90e0a714013b31c32888b0454d927b19b94f3c28b82e50a12d4fc0be6bd86747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A6 5032 bytes
font_01_sfnt_off000074b4.bin
1725ee51b7b3fbc363fce30350adbcaed6709bc8cae12aa04856df8b03a835c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 9908 bytes
font_02_sfnt_off00009695.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9695 4324 bytes

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