Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbc80405efe98f5…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 07:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 340aab31d433477dbe8ed407ac5dc504 SHA-1: f885b58c114ca0eff411b4df11eb30a8fe067ed3 SHA-256: fdbc80405efe98f59d8d180554d919d36012a9be2aa2e3d3f5e66a62c19cb944
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing 'fragged empire protagonist archive pdf' and the malicious URL, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=fragged+empire+protagonist+archive+pdf
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/77332221829.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/64115949253.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4119/files/46955169344.pdf
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/tabewugasigugosolifewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/34457482546.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/makhraj_of_arabic_letters.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/93692312821.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6186/files/39148920566.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41078692832.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/bazajotomuxixebowu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5091/files/automatic_transmission_seminar_report.pdf
    • https://cdn.shopify.com/s/files/1/0463/3414/8763/files/fisdap_ob_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/basic_linux_commands_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/79044625261.pdf
    • https://cdn.shopify.com/s/files/1/0430/5843/0106/files/sequence_of_tenses_rules.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_off00005ac1.bin
257ee251d9aff457ba989613dac8a1045d82b0cf8f0465f4bde6f769c3c998f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC1 5552 bytes
font_01_sfnt_off00006d7e.bin
d1140d0291dedd0810b438532b874a6d205b7926bea21587f0287937581736ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 14380 bytes