Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d4408b108b448d…

MALICIOUS

PDF

63.5 KB Created: 2020-08-26 10:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c91568d627e7a699a1d8bd9f1ab78a97 SHA-1: 2b088762804648ffd3136c58f08c55d096802e17 SHA-256: 61d4408b108b448dcca0ab1de2b321dcba97c1d579aa7441ae986c6890d3441f
162 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a redirector service known for malicious activity. The presence of a 'download button' lure further supports a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=project+not+built+in+active+configuration
    • http://tofada.tallahasseechinesemedicine.com/uploads/1/3/1/8/131856695/zigid.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6041/0021/files/vuvunejipodibefona.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/jibupupuxenasiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/cambridge_book_1_test_3_listening_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/jejopegodefi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0963/8553/files/xopaxokavone.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/zirixokakuvodutitaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/sevira.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/vawimejusogunozilafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2517/0595/files/96643283351.pdf
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/zadadetamerawulexelota.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/44738776257.pdf
    • https://cdn.shopify.com/s/files/1/0461/6463/9896/files/blossoms_of_the_savannah_novel.pdf
    • https://cdn.shopify.com/s/files/1/0432/4950/0315/files/pawegavawawu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0358/files/23896781854.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kosetomamevisired.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_off0000badb.bin
04019acf9a99b2dab2df44fb637e0628da126a0bc7138fd210039dea92e0b1ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBADB 5148 bytes
font_01_sfnt_off0000cc7e.bin
0109ae86a1386361bce4871cf51721432ab43d9c92ed4b3c10041e1ddbb9b84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 10544 bytes

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