Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d11f60bee79a269…

MALICIOUS

PDF

45.5 KB Created: 2020-08-17 03:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec975481feb2ee1abde96b13d0812915 SHA-1: 012b5ec0f8b34bcfd50a228823c42eeb6847bfb8 SHA-256: 3d11f60bee79a269b877eb651351d303830b5a71ab27f6d8cf7798b6be5d5d68
154 Risk Score

Malware Insights

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

The PDF file contains a lure related to a 'foe arc leveling guide' and embeds a significant number of external links, 24 in total, to other PDF files. One of these links, https://ttraff.ru/pify?keyword=foe+arc+leveling+guide, points to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of a malicious redirector and the link farm suggest a phishing or redirection attack aimed at compromising users.

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=foe+arc+leveling+guide
    • http://files.thatswhatshesentclothing.com/uploads/1/3/0/9/130969740/dawadape_gizog_vapefa_jivosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8975/6311/files/alliteration_worksheets_for_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/6975/8874/files/noxiximosafibitigeru.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/71139328243.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/libutufisolefod.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/gutirovadovolodogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7561/files/2252471270.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/jusewudinega.pdf
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/zaxipipafafegidiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/korepajal.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/national_budget_2020_19_bangladesh.pdf
    • https://cdn.shopify.com/s/files/1/0433/7201/9877/files/dizolitikubijawo.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_off000075a1.bin
b424c49cba4dd00fb158f676fd2ec11cf5b28c97118d4ca5814a058f05ff6313
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A1 4944 bytes
font_01_sfnt_off00008684.bin
c2a7f9e9a96b885fb69074a7cdd24813fa1f5553a0ceb6442240b07b345789d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8684 10292 bytes