Malicious PDF — malware analysis report

Static analysis result for SHA-256 627716bc238adfd5…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 10:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b9b2c0e4a103605a6be6a6912c943fa SHA-1: ab581cb00a3ae36452af002007ba2559e1fcc54d SHA-256: 627716bc238adfd5d4e503ef84347c56c0629f9f27069d90ff32a2ba09ae8e7a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a free software download. The document also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious link. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggests a phishing or scam attempt.

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/wix?keyword=serif+drawplus+x8+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nejoxalivivurotuzepebibus.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/jozamojure.pdf
    • https://cdn.shopify.com/s/files/1/0438/0416/4257/files/37174319926.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/49704044260.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/arcane_mage_build.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/function_of_trna.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/rujaziwukuxavo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/using_information_technology_11th_edition_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/8621/6344/files/format_of_job_letter_for_class_12.pdf
    • https://static.usrfiles.com/ugd/18f527_009ff0a982c84c4baa4f8930a68573a4.pdf
    • https://static.usrfiles.com/ugd/cfa91a_27098e85b21d4e879bb91a277bf7114c.pdf
    • https://cdn.shopify.com/s/files/1/0437/0635/1771/files/fofenavafa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3363/9584/files/causes_of_emotional_and_behavioral_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0462/4941/0714/files/printable_leveled_books_for_guided_reading.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/zuxasuwumedojupezawuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/54474487754.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_off00006672.bin
8011d6810eaa6ed836486d6ed07a62987d27ccfabf9de78a084b3452211306fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 5492 bytes
font_01_sfnt_off00007945.bin
f2379f5622bf194b1267c617401dff000f7900707ed4c664f88b5b9f1798a6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7945 10440 bytes

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