Malicious PDF — malware analysis report

Static analysis result for SHA-256 14170556389b8c93…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 16:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 056f85673c4b60ad5e596774273e4e80 SHA-1: 79e54146e0a6b693ad58832b816a3e2e6145cbff SHA-256: 14170556389b8c93f5ee8cf0e9de58a7bf5111556c388efac54c3737946c4074
162 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.cc, which is disguised as an email template. The presence of a "download button" heuristic further suggests a malicious workflow. While no scripts were extracted, the PDF structure and embedded links strongly indicate a phishing or redirection attempt.

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.cc/pify?keyword=sample+appreciation+email+template
    • http://files.brightfromthestartchildcare.com/uploads/1/3/2/6/132695698/mololesedafoxarel.pdf
    • http://files.pitdawghydro.com/uploads/1/3/1/4/131437513/bawojo-wuzukeluf-vidaxigi.pdf
    • http://files.sardishenderson.com/uploads/1/3/1/3/131398148/sogalozigek-galop-babasunav.pdf
    • http://files.jennavnichols.com/uploads/1/3/0/9/130969151/5083505.pdf
    • http://files.franibab.com/uploads/1/3/1/4/131437378/jopekupab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/9811/9071/files/55469374030.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/maternal_newborn_child_and_adolescent_health.pdf
    • https://cdn.shopify.com/s/files/1/0435/6964/3675/files/39753774271.pdf
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/short_form_berg_balance_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/526676753.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/definition_of_computer_technology.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/werawutobamumidexovivib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/11425087204.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/86672717747.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/68072757361.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/venevilejilil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/ranutesawefoduz.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/java_read_file_line_by_line.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/bitufiragomapagaduzikef.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_off00007c5c.bin
8b88697d77be302b6807e191868d4f4b3f8660844f42b2416d75ed0d1fac13f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 5004 bytes
font_01_sfnt_off00008d44.bin
239e2137018c3d32670691d247c41f2a96fb118e0615fe9363e27e5da982b2e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D44 10636 bytes

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