Malicious PDF — malware analysis report

Static analysis result for SHA-256 038dea3464c12a27…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 23:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7aa23a6c30f3ffa9512dbe643cc01ea2 SHA-1: d1daea0a4331342bcfff26dcb1a4ead4795e991c SHA-256: 038dea3464c12a273fd1450ff51365c03168adbcbaa202d84eb02f5104801e62
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector, disguised as educational material. The primary malicious link, https://ttraff.com/pify?keyword=cambridge+igcse+physics+workbook+third+edition+pdf, likely leads to a phishing or malware distribution site. The presence of many Shopify links suggests an attempt to blend malicious links with seemingly benign 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.com/pify?keyword=cambridge+igcse+physics+workbook+third+edition+pdf
    • http://files.mortonbaptistchurch.com/uploads/1/3/1/8/131871568/1040026.pdf
    • http://files.justicefarms.com/uploads/1/3/1/4/131437225/fbfb02ea27.pdf
    • http://files.patrickracingbillet.com/uploads/1/3/1/4/131413678/2694597.pdf
    • http://files.raharmonyasianmedicine.com/uploads/1/3/2/6/132696112/ebf417.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/31683159769.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3920/files/lodakeletunifidofidupifap.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/zagonofulipeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/wipumuzazavuwaxuxubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3459/1907/files/gepatagamebujubaveba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/14849645836.pdf
    • https://cdn.shopify.com/s/files/1/0429/6124/0220/files/65241361081.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/ruwakeroleniwemuguxese.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/rivepofelopadixu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/amber_run_i_found_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/list_tables_postgres.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/36481705239.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_off00006614.bin
7a97f63baf57d698605764b22e353be1de72455253977362c8e0d7b3366e3df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 5840 bytes
font_01_sfnt_off000079de.bin
4ebbccb199cfc85972ff9c177d9f9a5a95e3f31ffbb04f767b0dc1446188d72b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DE 10824 bytes

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