Malicious PDF — malware analysis report

Static analysis result for SHA-256 748d40fc580454f0…

MALICIOUS

PDF

38.3 KB Created: 2020-08-25 17:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce3605ea45fa0f5397313ec79bc76d79 SHA-1: fd20489912f38b650177c605f60ba2b1524dbc1f SHA-256: 748d40fc580454f02df72c0e6a1d2ce5ab842562344f2c766c106d0ce7bf5963
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a phishing or malware download site. The document body, though heavily obfuscated, contains text related to 'airtime scanner app' and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute the malicious payload or improve SEO for malicious content.

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=airtime+scanner+app
    • http://fivugenu.thesandboxexchange.com/uploads/1/3/2/6/132695832/f3524f27f7f5a0.pdf
    • http://zuvak.swsmith.com/uploads/1/3/0/8/130813042/siwebuvejig_pizaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/1473/9352/files/fotagubejovojim.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/79028651690.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/67171635953.pdf
    • https://cdn.shopify.com/s/files/1/0432/7777/9100/files/torusofokigilenenor.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/kexurewinapavebefozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/58706833477.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/3787269910.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/8362733709.pdf
    • https://cdn.shopify.com/s/files/1/0430/4591/2727/files/kraft_heinz_food_company_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3252/files/os_canones_de_dort.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zigomotixiwututorevibalu.pdf
    • https://cdn.shopify.com/s/files/1/0444/3154/0391/files/88625249795.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_off00005732.bin
b7d3281b27d23acea1e5b9cd7070560c28e511cbf51a355450501be144599d9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5732 5036 bytes
font_01_sfnt_off00006832.bin
76819c2be64062e6094eaeb1010eb99dee7cbbcc225a6d379e8ae2a42ea2eabc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 10752 bytes