Malicious PDF — malware analysis report

Static analysis result for SHA-256 d369b3e2baa9ea04…

MALICIOUS

PDF

62.0 KB Created: 2020-08-11 09:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8279fb98f470cc770d6786897accb8f SHA-1: 71325236523cd51f9589025053f930bb86c0e27b SHA-256: d369b3e2baa9ea04858f3b43af302aaeea875f221b641d5e88e8d49f629af52c
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=blockchain+iot+applications+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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=blockchain+iot+applications+pdf
    • http://pujotena.michellaperera.com/uploads/1/3/1/4/131453850/81abe1cd0542f.pdf
    • http://files.lifeguardtraining.org/uploads/1/3/2/8/132814096/loforam.pdf
    • http://files.kschnallart.com/uploads/1/3/2/7/132740277/fufajanevod.pdf
    • https://cdn.shopify.com/s/files/1/0435/9307/2808/files/gologarolojeki.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/todubemitebedotozozanin.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/auditorium_acoustic_design_case_study.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/tapibajoli.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7861/files/kokikisakinegonivuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/javigazamimuzasig.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/rewabavutoxej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovonuvebapade.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/windows_10_reset_tcp_ip.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/bapazo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/podupuwadakikixadol.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/46968551392.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/nypd_cas_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/44169350587.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/8907201968.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/
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/todubemiteb

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a372.bin
cd76e0ced5d10719fbfa56f01c357c0c26843708de95ced2e4ecf76f6839774b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA372 4932 bytes
font_01_sfnt_off0000b41b.bin
d372610eaf12db7cd76f765c42eb7778c1ce6654da5238dcbf403dc0cbf0dd47		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 12268 bytes
font_02_sfnt_off0000dc79.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC79 4324 bytes

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