Malicious PDF — malware analysis report

Static analysis result for SHA-256 611b4c7cbc12b582…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 23:39:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a9af079d5c2fc05882445d94a2310bf SHA-1: ae515e499fd8bae1b717d4d392bf2a63d8311217 SHA-256: 611b4c7cbc12b5824c759e8c5a47cf648eb2024514c8684c7a9797b23b1981fb
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, suggesting an attempt to direct users to harmful content. The presence of a link promising 'free animated logo maker software' indicates a social engineering lure. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed for user redirection.

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.me/wix?keyword=free+animated+logo+maker+software
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/10993746796.pdf
    • https://cdn.shopify.com/s/files/1/0453/8662/9288/files/bactrias_anaerbias.pdf
    • https://cdn.shopify.com/s/files/1/0464/6862/8630/files/windows_10_enterprise_1803_esd.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/solovizotote.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8137/files/49964418464.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/xabonagadokuxa.pdf
    • https://cdn.shopify.com/s/files/1/0439/1115/1768/files/31685995918.pdf
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/99392375281.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/sutotukivikazepirokabudaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/heartsaver_cpr_aed_student_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/6871/0294/files/discord_overlay_destiny_2.pdf
    • https://cdn.shopify.com/s/files/1/0444/3511/2103/files/pomieszczenia_w_domu_po_angielsku_wiczenia_dla_dzieci.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_off000064b7.bin
c47ddc9cc0b761167b170cd6c634696eca6d6654f3f3d20eba03fcecdf78eea9
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 5340 bytes
font_01_sfnt_off000076df.bin
08a7ba4a02fcb7da723b1075b11a133c981a3fe584f13fcb57ce9195597c1e97
pdf-font-stream PDF embedded font (sfnt) at offset 0x76DF 10504 bytes