Malicious PDF — malware analysis report

Static analysis result for SHA-256 612bed6481347a32…

MALICIOUS

PDF

57.1 KB Created: 2020-08-18 14:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a56b0ce5998da47d406a04d6aa6cf5b1 SHA-1: 472ecd92e69e3703693448f2c7148df971d95f59 SHA-256: 612bed6481347a32bee68aca33f8740c53adfd1131e37828ab5112c9d0d4bf9d
162 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'ttraff.com' domain, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Paypal rest api developer guide' and the malicious URL, suggesting a phishing or scam lure. The presence of numerous other PDF links, many pointing to Shopify domains, indicates a link farm used to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=paypal+rest+api+developer+guide
    • http://files.jandjfinancialsolutions.com/uploads/1/3/0/7/130738876/cb7aba090c.pdf
    • http://tafizo.unmundo-en.org/uploads/1/3/0/9/130969503/b34ecfa6060d46.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/gojafaruvupikaravopepuwor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/sosisifuxefuzofosedi.pdf
    • https://cdn.shopify.com/s/files/1/0449/0684/0231/files/pneumatic_robotic_arm.pdf
    • https://cdn.shopify.com/s/files/1/0446/5616/5027/files/jajitorikosilowum.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/free_assured_tenancy_agreement_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/bhse_onkelz_heilige_lieder_album_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/duzebujupij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/69515435868.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/linear_equations_practice_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/1389/6352/files/thinking_out_loud_sheet_music_musescore.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/minecraft_capture_the_flag_server.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_off0000a188.bin
316838084212f5ac1510fa27e12f092f0720fda174660f43927e601570cc1c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA188 5288 bytes
font_01_sfnt_off0000b39f.bin
59f68f2fedcc2ed8c0cfdd02b6352a52bfe29e8c0c59c0c7b1f81918597ac109		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB39F 10732 bytes

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