Malicious PDF — malware analysis report

Static analysis result for SHA-256 d983976499507334…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 07:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2821ecbed9d3ac10c1911e9423da3f85 SHA-1: 60e26cb0ab7cb2bd6d2ee55d9e739e164a07f7dd SHA-256: d98397649950733463e57100fc569ef3a28c849c13be3184ecb1ecef8be2af00
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference academic content, likely as a lure. The primary malicious URL is https://ttraff.com/wix?keyword=exercicios+sobre+a+independencia+do+haiti+e+america+espanhola+8+ano, which is linked to known malicious infrastructure. The PDF also hosts a large number of links to Shopify domains, many of which are likely part of a link farm to improve SEO for malicious content.

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/wix?keyword=exercicios+sobre+a+independencia+do+haiti+e+america+espanhola+8+ano
    • https://cdn.shopify.com/s/files/1/0433/9043/5495/files/isaac_albeniz_asturias_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/51353086228.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/28682727010.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/welezuxojotipamotov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7792/6040/files/aceptacion_radical_gratis.pdf
    • https://static.usrfiles.com/ugd/e6092c_4025a8157e674cb3bcd87a8777b7c6fa.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_52998d4549ce4d0faf0740593a0e660b.pdf
    • https://static.usrfiles.com/ugd/4725f1_da5d0016708f48ccaab39711196e0c17.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/49492228060.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/lisakunem.pdf
    • https://static.usrfiles.com/ugd/0d089b_5a3dacf754294277b81d7b5de24307d4.pdf
    • https://static.usrfiles.com/ugd/c345b0_af8c65df8396451a9a74a7df5b8ecf57.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e3c.bin
b6a556578d0eaba61e1b0f4d9899de7eeb063e5e7662ceeb7003458912d43af1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3C 5672 bytes
font_01_sfnt_off00007152.bin
4f955246eebb3ff0b7c9438e7f70c672de97231ae422feb0e75ed87bca5cdb54
pdf-font-stream PDF embedded font (sfnt) at offset 0x7152 11440 bytes