Malicious PDF — malware analysis report

Static analysis result for SHA-256 1820d773d27d5ab8…

MALICIOUS

PDF

41.0 KB Created: 2020-08-30 11:33:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3be1a7fa65c2cc3ae07cffe36f88bf82 SHA-1: d47836929ae256544f2df09dd5abc7b8dbef0126 SHA-256: 1820d773d27d5ab8d0ad25e0e0119a01ec8f20e3dc10f2552df594a0dffdd115
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Eso alchemy leveling guide' and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous links and the malicious redirector indicate a likely attempt to drive traffic to malicious infrastructure.

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=eso+alchemy+leveling+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/ions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/62020040038.pdf
    • https://cdn.shopify.com/s/files/1/0440/3852/0997/files/vzw._com_vm-_update303.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/wataxulupowok.pdf
    • https://cdn.shopify.com/s/files/1/0435/2317/8656/files/node_js_best_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/0739/3435/files/adobe_reader_update_version_11_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/concept_of_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8686/files/dojixojukesuwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/35277380180.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed84d129d6d0410a94a5d885818b2d5d.pdf
    • https://static.usrfiles.com/ugd/6f53d7_8bcbc870b9464203a1614d2c98dd4bdc.pdf
    • https://static.usrfiles.com/ugd/9dda13_a7c4d88030a4465cb65fced8d96993c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_41741e7f48c141b7bf49d0f3b2fdd660.pdf
    • https://static.usrfiles.com/ugd/353d00_15798decbf2e491ca89a607cace66bfb.pdf
    • https://static.usrfiles.com/ugd/b8c837_290324ef6a014476a21a3c596d73df96.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_off000061f0.bin
5e0113110e0474a02264b852be43819e365b58589b3231d7f2875843b50f9e87
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F0 5376 bytes
font_01_sfnt_off00007429.bin
78aa9ff431285dd3665d4e5da5e9a8acac7e69bb232b12316304f177059e4133
pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 10288 bytes