Malicious PDF — malware analysis report

Static analysis result for SHA-256 408d74d7c418db57…

MALICIOUS

PDF

36.4 KB Created: 2020-08-05 23:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6b842902360cde678a5d206c9a9615 SHA-1: 0d7c6892e1df8895f0969ff66331dff84709694a SHA-256: 408d74d7c418db572235bb60609cf6763c9a01ae0ba965cd577fd95542eb47a1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to a religious figure. It also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various domains, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click the malicious link, likely leading to a phishing page or further malware download.

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.cc/pify?keyword=jesus+de+nazaret+benedicto+xvi+pdf
    • http://files.petraits.ca/uploads/1/3/2/8/132815343/xosubijofel.pdf
    • http://files.thinkingcongregations.com/uploads/1/3/0/7/130740012/99f8828.pdf
    • http://files.seanbiehnmusiccareer.com/uploads/1/3/1/4/131483097/6293497.pdf
    • http://lazotemi.cancunrivieramaya.tours/uploads/1/3/2/6/132695306/pozupaje_fesosajaduti_zagagix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/melevuzifejotugavumur.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/cells_of_the_immune_system_student_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/0363/4079/files/masilodejusakon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/historia_de_la_drogadiccion.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/84529458150.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/20968307109.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/79728313153.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/bemeperoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8742/9785/files/tizidubidenegon.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/student_council_speeches_examples.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_off00004b9a.bin
48c7c069cc35a4f0e60e505ed5bd576088395075f168f8d6b8b93d99d9fa72f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9A 5424 bytes
font_01_sfnt_off00005e2a.bin
778ea7b915408f83f8e93ac833e98ef079acaa645919c3d4403bb21c2ec9e31e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2A 11468 bytes