Malicious PDF — malware analysis report

Static analysis result for SHA-256 03050ca505711231…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 11:29:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a97362019c9c65ebaa94e6c8acf3b2 SHA-1: 9a3d5141b6f1691e8bcb12d9dff2b5353f9185a7 SHA-256: 03050ca5057112314fe4d1283a3b9fea225220f045e433c89f4b13ecca0db532
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary links, https://ttraff.com/wix?keyword=que+es+una+se%25C3%25B1al+analogica, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and others, indicating an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=que+es+una+se%25C3%25B1al+analogica
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/68140604167.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/wopoluxigeluwitubimowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2150/files/6414966425.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodujanizovu.pdf
    • https://static.usrfiles.com/ugd/1f5cef_648b5a4a6659450aa298bce5f4092774.pdf
    • https://static.usrfiles.com/ugd/b8c837_5af6dc5364c24ce1a528da0d279820a9.pdf
    • https://static.usrfiles.com/ugd/5ed537_0b48ccd7d4c2403883b42c2420bc5337.pdf
    • https://static.usrfiles.com/ugd/b8c837_7de288fed27540c89c218e76bc81b2e8.pdf
    • https://static.usrfiles.com/ugd/50c35f_0caad3ecaad340658b63bc7fb6c5fe92.pdf
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/picsart_background_4k_photos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/zeloxaturufaguwibebo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/29640811835.pdf
    • https://cdn.shopify.com/s/files/1/0431/2494/9153/files/watuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1306/9210/files/dungeons_and_dragons_2e_players_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/5031/9528/files/toxefe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/maria_montessori_theory.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/guxivufinunubo.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_off00006652.bin
d0f42b06680714c5e3e475ffdf6bb61f333d35482ed6d01035b81c1b5327c207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6652 5144 bytes
font_01_sfnt_off000077a7.bin
96b8d2cabe5e735da34ef507f212c6f7e61a5245d598e8f694364c90f4f4846b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 11504 bytes

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