Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e75fc1655c1101…

MALICIOUS

PDF

36.9 KB Created: 2020-08-07 05:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7557a6f1165f30c0a327baff0edae39a SHA-1: 3de5302a34ddff92ad92d1e4506a0a4f7affeba6 SHA-256: 06e75fc1655c11018163bd610960d4fff7a9255b556ae0d835b6f1091a5a889a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=aquella+orilla+nuestra+elvira+sastre+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious infrastructure, likely for phishing or malware distribution.

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=aquella+orilla+nuestra+elvira+sastre+pdf
    • http://files.sfhsphoto.com/uploads/1/3/1/4/131453109/roviduf.pdf
    • http://files.vivagreb.com/uploads/1/3/1/6/131637034/kimab-sugala.pdf
    • http://files.linesidephotos-europe.com/uploads/1/3/0/7/130776536/8306269.pdf
    • http://dutigeval.davidpowerup.com/uploads/1/3/1/4/131406592/xikosonofogo-vujakopowaner.pdf
    • http://files.thelightwithinnh.com/uploads/1/3/0/7/130775893/7575614.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/malayala_manorama_calendar_2020_june.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/bibuburatopituxejuned.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6063/files/65860511066.pdf
    • https://cdn.shopify.com/s/files/1/0434/6927/5286/files/wulaxovo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/solving_limits_algebraically.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/87870374236.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/java_foundations_john_lewis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/63960402409.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/trumpet_scales_and_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8988/files/leappad_connect_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/4290/6007/files/2024376875.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7556/files/batwoman_comics.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_off0000525d.bin
a09289c22a48ef41d3327b76e42d8b055e32b80cebc2f82aefcb97f9e6c9ecf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x525D 5208 bytes
font_01_sfnt_off0000642a.bin
bd56035f2782c797c24117f8c57f92fdcb4e2640df0e9df63611082e34b99f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642A 10088 bytes

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