Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a03a3edfeb9eb3…

MALICIOUS

PDF

51.0 KB Created: 2020-08-12 23:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c8579c0420d3dd87437ac0958e0c50 SHA-1: c3acdfe0647da269065789589791245903804f32 SHA-256: 19a03a3edfeb9eb375cb6c470ab4be932b575ff18cd093f7fe3e7a8f62d81323
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=autoclaved+aerated+concrete+block+pdf, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=autoclaved+aerated+concrete+block+pdf
    • http://files.sportpic.co.il/uploads/1/3/1/4/131453649/9346619.pdf
    • http://kemax.allthingsclown.com/uploads/1/3/1/6/131636664/247465f6.pdf
    • http://files.lillinghallhanoverians.co.uk/uploads/1/3/1/4/131412603/bokunuzosopakepeb.pdf
    • http://files.deborahsvoice.net/uploads/1/3/0/7/130740141/pofakexolariwexi.pdf
    • http://vejel.elslandscapeinc.com/uploads/1/3/1/6/131637136/godefajovisijanolix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/aggie_war_hymn_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/tunoxuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/8531/4715/files/enter_sandman_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/19887018466.pdf
    • https://cdn.shopify.com/s/files/1/0434/7366/6213/files/44013068984.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/how_to_crack_wd_my_passport_password.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/dewiruxadifodikamuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/82558998055.pdf
    • https://cdn.shopify.com/s/files/1/0449/6248/0296/files/southwest_confirmation_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9057/files/mibajerabovoram.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/26678787098.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_off00007e71.bin
167674b2d5582d5000314d3dee9a46eed159de0081af58e1508ef766fb6ec24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E71 5224 bytes
font_01_sfnt_off00009048.bin
bcb987b3adfbdbac436f46191eca01c87cc5c76571c0f953d8d783fa904687ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9048 15140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.