Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43a26907d5b01e7…

MALICIOUS

PDF

64.1 KB Created: 2020-08-15 03:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc55f2580f6da20528ed5669a9479853 SHA-1: 24cbba7feacbbf9f605a6500372c56b3787f55ff SHA-256: e43a26907d5b01e7b9e902ad3495bf9fdcb2d636e3345f67ac4112cc53c40f1e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to '2019 nfl draft qb scouting reports', suggesting a lure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=2019+nfl+draft+qb+scouting+reports', which likely serves as the initial entry point to a malicious chain.

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=2019+nfl+draft+qb+scouting+reports
    • http://files.ysgolcybi.com/uploads/1/3/0/7/130775959/9442c4f94.pdf
    • http://files.jenniferdemarestresidential.com/uploads/1/3/0/7/130776805/6537279.pdf
    • http://files.store.sssus.com/uploads/1/3/1/4/131453917/3464356.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7020/files/gexawubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kusamusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95936092566.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/bash_sort_by_column.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/madefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9917/5579/files/trapz_function_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/28285922584.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/11554725776.pdf
    • https://cdn.shopify.com/s/files/1/0449/8771/1656/files/phonetic_symbols_for_vowels_and_consonant_sounds_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0435/1649/3976/files/ortopedia_y_traumatologia_basica.pdf
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/st_119._1.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/16610139928.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/brunnstrom_technique.pdf
    • https://cdn.shopify.com/s/files/1/0449/0277/6999/files/annexure_e1_form_hssc.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb41.bin
db307c5cd4ec5e9f07060f837a6aec0bd2921b7f3889a2ffc9fb2518e9c12c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB41 5976 bytes
font_01_sfnt_off0000cf8c.bin
1a2b7d1309f11563bf02293b2f60bc385e1265676dcfb1c2e812755aa10d0375		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8C 10424 bytes

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