Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb41d57fbdf2e18…

MALICIOUS

PDF

41.3 KB Created: 2020-09-06 20:51:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33cc2e10a8119f9c8d2cd82d1773ea28 SHA-1: 30a560f236fb8937b6bd32e7720b84fc7f2abcbf SHA-256: 5eb41d57fbdf2e1822f8ffdb86b768c3d3dd0d77df71d1495c2da5042df58d9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. This redirector, 'ttraff.me', likely serves as a gateway to further malicious content, potentially a phishing page or malware download. The presence of numerous Shopify links suggests an attempt to obscure the true malicious destination by hosting benign-looking PDFs, a common tactic in link farm attacks.

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.me/wix?keyword=the+integumentary+system+review+sheet+7+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0441/0490/8952/files/50087102718.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/d9_88_db_8cusn.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/63633662477.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/29313343092.pdf
    • https://cdn.shopify.com/s/files/1/0434/1891/0876/files/irc_freenode_net.pdf
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/life_application_study_bible_nlt_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/14427779084.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/21390908721.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/job_interview_question_and_answer_for_teacher.pdf
    • https://static.usrfiles.com/ugd/dd4472_ce2db043f4dd4157815f36675b4ccfc9.pdf
    • https://static.usrfiles.com/ugd/0cd019_5952ff1c7aa74c5fa415e44eebe3221f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000575a.bin
7381f1ac23917023f9ab150dcafccdf031d6b6a86c9a23336e8eab31fa834efd
pdf-font-stream PDF embedded font (sfnt) at offset 0x575A 5124 bytes
font_01_sfnt_off000068ad.bin
d2c22849cb17ddbb77deb3da7d57e37e7339e05df3454bc5cd437693fb57bb16
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AD 9840 bytes
font_02_sfnt_off00008a40.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A40 4324 bytes