Malicious PDF — malware analysis report

Static analysis result for SHA-256 7419f384eff21c3b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-18 22:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ab22bbe47be23c4b2b3f3cba4f78b91 SHA-1: 2373d79ddfe051c6d77ad6b567ba13753ce0de39 SHA-256: 7419f384eff21c3b2154353a8140d9baf2accda6e477c567a0372dbb5e856b48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to manipulate search engine results. One of these links, https://ttraff.ru/pify?keyword=solo+guitar+playing+pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=solo+guitar+playing+pdf
    • http://files.pylkkanenconsulting.com/uploads/1/3/1/4/131412558/55176cfde938bc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5101/5577/files/bulelovalifeletaku.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1554/files/mabujomijum.pdf
    • https://cdn.shopify.com/s/files/1/0432/7935/1976/files/analog_digital_conversion_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/41466503076.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/gobivuribiwezifexaxalet.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1930/files/28822065016.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/nosuposekulafewiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2374/4674/files/lightroom_editor_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/convert_to_word_document_that_can_be_edited.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.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_off00006679.bin
da8f40acf95fd0a902a78f8078dcf4cb048ea44e0fc27b794b39e1a71a5571f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6679 5000 bytes
font_01_sfnt_off00007782.bin
2b63fe4b01f6f62ce20a211ffb36b1c56cd7f5f586403e079cb2b9382ad779a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7782 9992 bytes
font_02_sfnt_off000099bc.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x99BC 4324 bytes