Malicious PDF — malware analysis report

Static analysis result for SHA-256 190835759793fb23…

MALICIOUS

PDF

45.8 KB Created: 2020-08-16 20:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f71d17088b48cf84df14d8c02affcc7 SHA-1: 445227da7054b9ab0d7caf23c94c5897b9191edc SHA-256: 190835759793fb23fb731df449cb9490bfe2f1d0422ff005778744e32ec99d31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, 'https://ttraff.ru/pify?keyword=similarities+between+meiosis+and+mitosis+pdf', points to known malicious redirector infrastructure. The document appears to be a link farm designed to direct users to potentially harmful websites, masquerading as a benign topic.

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=similarities+between+meiosis+and+mitosis+pdf
    • http://files.americanitaliancancer.org/uploads/1/3/1/1/131163969/sipufujunele-pubipa-tofolozavoxize-xoxojopobasano.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0455/6242/9605/files/basic_colour_wheel_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/liwunoguwe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5413/6473/files/a_travs_de_mi_ventana_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/relinebidexoganakimepil.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/creo_parametric_4._0_tutorial_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0429/5619/3955/files/hollywood_adventure_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/easy_ukulele_chord_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8242/files/airpods_2_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/zuxanosefuzenof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/intergas_boiler_manual.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_off00006702.bin
86cd16307cd6bc81323c85eedccfbbc2520832c6d6a966b8929bb5f8d7c2c8ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6702 5312 bytes
font_01_sfnt_off000078ef.bin
0e7ff0049eb2bcf23468d0126e799888b055a87dd9f3181f124ffd5aeb708d14
pdf-font-stream PDF embedded font (sfnt) at offset 0x78EF 10376 bytes
font_02_sfnt_off00009c4d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4D 4324 bytes