Malicious PDF — malware analysis report

Static analysis result for SHA-256 152de77e193c9be9…

MALICIOUS

PDF

74.7 KB Created: 2020-08-16 18:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbd909cb48bbdb7423592713b34bf4eb SHA-1: 9c26042d27970b7bcbe5ba80f8a79a9c40338e49 SHA-256: 152de77e193c9be91b158906fcbaca08101030da386a44961205c56abf734826
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking Shopify links, suggesting a lure for users to click through. The ML classifier also strongly indicated maliciousness.

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=business+entrepreneurship+books+pdf
    • http://butelufuj.msjain.info/uploads/1/3/1/3/131384429/7369941d600f91.pdf
    • http://jegome.simpliik.com/uploads/1/3/1/3/131384536/javoxafezux-butikebofidi-sabelevabowo.pdf
    • http://mefivu.centerforburmastudies.com/uploads/1/3/1/3/131383444/5c5a18.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5845/3918/files/4458750194.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/22285265039.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5093/files/tazubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0430/files/61655109724.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2696/files/vunupobuporamafilag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/4894011378.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5910/files/bifofariruroxoreruxit.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/clinical_anatomy_moore_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/bupixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2030/4034/files/bise_fsd_9th_result_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4911/5029/files/migugogububimowu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/75027513734.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_off0000e6f7.bin
6f5d36ed4b8759b1658a5be3167ac2bc7ac3421095ffd5b757c3577981c2e304		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 5140 bytes
font_01_sfnt_off0000f865.bin
b877ce488e59b68a40e0182ab486e8d556a472b23cb46f19a6dbf3734124a96e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 10764 bytes

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