Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e324615adc302b…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 17:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d301ec5891f88c34a1594ace1a572d6 SHA-1: 4fab4b59b1563d6dfb14107931f92fd3ba666f5f SHA-256: 69e324615adc302b9e6cc20c4b3de080d6bc1a95003d3382d558813db3ee0c51
162 Risk Score

Malware Insights

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

The PDF contains a lure for a 'visa application form', combined with heuristics indicating it's a malicious redirector and part of a link farm. The primary malicious URL, https://ttraff.me/wix?keyword=visa+application+form+korea+2019, is likely used to redirect users to a malicious site. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick users into clicking malicious links, aligning with spearphishing tactics.

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.me/wix?keyword=visa+application+form+korea+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/losezumumi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/binuwopoxinogulanizotogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/spanish_2_final_exam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/78505938442.pdf
    • https://cdn.shopify.com/s/files/1/0450/4194/2678/files/american_reunion_full_movie_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0074/files/kagakumaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/keto_diet_book_best_seller.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8584/files/chola_ms_health_insurance_pre_auth_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/addition_with_regrouping_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/85739186700.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27039997465.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/25479644141.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8299/files/diferentes_tipos_de_enlaces_quimicos.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e7d.bin
8187145963fbf8e0b7977f93bb9cbfc296fb812f6e2b6f40a3c8d31ca5a797a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 6744 bytes
font_01_sfnt_off00006f64.bin
76fe1f716324f39c71a8f88a85646b0ad77cea4b0667dd39b5dda8bb2fa90f9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5672 bytes
font_02_sfnt_off000082a9.bin
bdb33d8f2f9821a3dd6de62fcad341696f707c0623ed3379b60aa7ba316baac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82A9 10244 bytes

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