Malicious PDF — malware analysis report

Static analysis result for SHA-256 0247eada8d3d7b73…

MALICIOUS

PDF

36.7 KB Created: 2020-08-31 09:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcc52fb407828766cf6993649c09aba6 SHA-1: e59d9b1c415dafeda3b1db001ab4bf0b25e74bb4 SHA-256: 0247eada8d3d7b73ddefcd65a7900a307850aa1df2be9e92540e9afd5d8625c1
162 Risk Score

Malware Insights

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

The PDF contains a link disguised as a ringtone download that redirects to the malicious URL https://ttraff.com/wix?keyword=wallander+ringtone+download. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The presence of numerous PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to distribute 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=wallander+ringtone+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7709/8902/files/52050861645.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/mewoloronixila.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/20258716939.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/pathophysiology_and_pharmacotherapy_of_cardiovascular_disease.pdf
    • https://cdn.shopify.com/s/files/1/0433/8306/2678/files/cambridge_primary_curriculum_framework.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/32180636060.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/32129902462.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7204/files/powerpoint_timeline_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8706/0378/files/calculating_magnification_worksheet_gcse.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/magazine_street_shopping_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0128/1701/files/16180049317.pdf
    • https://static.usrfiles.com/ugd/70a38d_558301255003444985b4b52404558414.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d87e6d813ea4411828a438f86427d85.pdf
    • https://static.usrfiles.com/ugd/fb5067_0f67fa3e1afe4f38ab69474d4e5a41ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_f25449f8f3d245d2bead0c1867bef2d9.pdf
    • https://static.usrfiles.com/ugd/a838c0_09eb35000eff497e942f964915d0a70b.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_off00004f38.bin
670ea14b05f09d51eaf054cf2c40716b0598896ce8e3eb58e0dd6e71f2686023		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F38 4920 bytes
font_01_sfnt_off00006015.bin
8581a1dd57e9b1cfc42a001def4ac5fa205f310e9024fb8bb8cc7b5da141e0f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 11876 bytes

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