Malicious PDF — malware analysis report

Static analysis result for SHA-256 14bc40f968e758b4…

MALICIOUS

PDF

52.5 KB Created: 2020-08-14 20:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a45d0b3b716ff7435195acadd32905a SHA-1: 5ff8d88fcf5f38c3950495730f7ccfbc9baf2e7a SHA-256: 14bc40f968e758b4d0d98931272e48eeba154398ccc9e3c9a682091df443c547
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=samsung+android+master+reset+code'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are to benign Shopify domains but some are to unknown domains. The presence of urgency and password-protected archive lures suggests a phishing or credential harvesting attempt, or a method to bypass initial security checks.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/pify?keyword=samsung+android+master+reset+code
    • http://voliraf.poconohydrofarm.com/uploads/1/3/1/0/131071157/8097541.pdf
    • http://files.moonflowerwellnessavl.com/uploads/1/3/0/8/130814169/latekanesojo.pdf
    • http://wifan.serendipiteorganiques.com/uploads/1/3/0/8/130874631/wewusasixegupesif.pdf
    • http://bezerosi.advancedbusinessadvisorsllc.com/uploads/1/3/0/8/130814297/a52e073f246.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0286/1464/files/lajejamexulexex.pdf
    • https://cdn.shopify.com/s/files/1/0437/4292/0869/files/jabififufewelozix.pdf
    • https://cdn.shopify.com/s/files/1/0441/2126/0184/files/nonlinear_programming_bazaraa_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1373/files/23768865016.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/facebook_family_feud_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/benami_act_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0432/5883/9198/files/99553265150.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/14540222454.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/xusibegisanawana.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6862/files/nitracion_de_acetanilida.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/89766651566.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_off00007e04.bin
4455747fda9ac97410526ac3fee3ca643cc61cb592146befb7df79af2604d95b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E04 6424 bytes
font_01_sfnt_off00008de6.bin
7795ed14db32afe9f07048ee9134d8365bba516d37645060e0171a0cbb5d3d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 5328 bytes
font_02_sfnt_off00009fe1.bin
78ad00a0afa0496c1e9936fc3d9a41057534da6bced3bd814669f007fce05288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE1 10924 bytes

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