Malicious PDF — malware analysis report

Static analysis result for SHA-256 7179f219536887fb…

MALICIOUS

PDF

49.1 KB Created: 2020-08-25 18:37:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0126d1f954d47821da11f1ed42ddc9e SHA-1: 254f261bc13c6c1b5a70abf1db46d5da219f09db SHA-256: 7179f219536887fb85077862ebb77ed7041b711919b6adb24c3a93093e4e61e4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to direct users to malicious sites, likely for phishing or further malware delivery. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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=animal+crossing+town+names
    • http://files.foodintolerance.net/uploads/1/3/2/7/132710780/wamel.pdf
    • http://xitudonus.thorssenquarterhorses.com/uploads/1/3/0/8/130813848/dopibosizo.pdf
    • http://mokiru.pickwickpugs.com/uploads/1/3/2/3/132303035/8519122.pdf
    • http://libud.andyjohnjones.com/uploads/1/3/1/3/131398109/gimut_gugiwikavelurux_samowazovo_vebirixonog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/kasiku.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/isomeria_dos_alcanos_alcenos_e_alcinos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/detroit_diesel_strain.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/rekozukijajoteregajozuso.pdf
    • https://cdn.shopify.com/s/files/1/0454/2958/8124/files/vevo_music_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/7478/9281/files/tuxaniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7226/6150/files/lipidizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/guwesimutetalajizobanubel.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/26404161192.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/nenebeputojav.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/78752777976.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d3f.bin
28446bb3928d183e028a803f18b026eb1767db51570599a6ed9fc554fb8103df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3F 5200 bytes
font_01_sfnt_off00007ed8.bin
f689a06cb9f07a4ca3dcadf362d300ee9215c0374d0ba5228300ce8221d5a557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED8 10476 bytes
font_02_sfnt_off0000a2c6.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C6 16036 bytes

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