Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4aabee38248d2f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 14:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fe2d3b1745621deaae1b8b0eaa8df35 SHA-1: 6fd05b4ac6c2229fda5c362954c1420f8acad718 SHA-256: 6d4aabee38248d2f76305457d17242e09e9974353452b97e5923df326a6a1c81
154 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which, https://ttraff.me/wix?keyword=undistributed+earnings+on+balance+sheet, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to financial terms and the malicious URL, suggesting a phishing or scam attempt. The presence of numerous Shopify links, while many are benign, contributes to the overall SEO link farm characteristic, indicating an attempt to manipulate search results or distribute content widely. No scripts were extracted from this sample.

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.me/wix?keyword=undistributed+earnings+on+balance+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1522/4996/files/28945952495.pdf
    • https://cdn.shopify.com/s/files/1/0439/1239/6968/files/pesijaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7842/6534/files/jeep_liberty_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0931/files/rabigidoguka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0404/3170/files/emulator_pc_ringan_untuk_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/gonumenot.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/ditozinebit.pdf
    • https://cdn.shopify.com/s/files/1/0434/3008/4760/files/sajusug.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0434/8248/0806/files/35546061336.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/josuwufapurexekimul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/jeguki.pdf
    • https://static.usrfiles.com/ugd/003b86_f245ca9fb54a4e9cbd1f539b20b17a81.pdf
    • https://static.usrfiles.com/ugd/cc089a_fc602b7e49dc4053a218eedc8b5c172f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f0319a854b64c66869ff6cf01c08012.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_off000065d0.bin
e9f9369023602ca24c78e9998e975da82bd3ab44c25d806da15577947b3ec65f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D0 5332 bytes
font_01_sfnt_off000077da.bin
e8a66dbb1b72649eae0262b2d3b53fc0029a578f845e0cafe27795ff71d5e135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 10420 bytes

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