Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd5f5cfb6a392d9…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 15:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c84aafcbdeb5283935de21973cf9da13 SHA-1: 8339d7427a8a28f2a66224dae99eadb279c20b8f SHA-256: ffd5f5cfb6a392d9d73acc0f9db65673e20769b88baf8d7adb0717c62e0b114c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure for a worksheet answer key, which is a common social engineering tactic. It embeds numerous links, with one critical link pointing to a known malicious redirector at 'ttraff.cc'. The PDF also contains a large number of other links, many of which are hosted on potentially suspicious domains, suggesting a link farm for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly indicate a phishing or malware distribution attempt.

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.cc/pify?keyword=model+3+domains+and+kingdoms+worksheet+answers
    • http://jumuxebun.smothermanbatlab.com/uploads/1/3/0/9/130969352/ffc5a314333.pdf
    • http://files.celebrationrotarypancakerun.com/uploads/1/3/1/4/131408204/jepaluv_lalidova_kanagul.pdf
    • http://files.capitalfinancialplanningcharitablefoundation.com/uploads/1/3/1/4/131437669/9624467.pdf
    • http://files.rachelsalwayswrite.com/uploads/1/3/1/4/131454352/winuvekog.pdf
    • http://tesono.robynpforrryan.com/uploads/1/3/1/3/131381204/577568.pdf
    • https://cdn.shopify.com/s/files/1/0451/3175/9769/files/convert_to_word_acrobat_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/short_inflammatory_bowel_disease_questionnaire_sibdq.pdf
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/13761084335.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/99008489175.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/rupavorebel.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/34834548441.pdf
    • https://cdn.shopify.com/s/files/1/0436/9966/7099/files/lisugarow.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/principle_centered_leadership_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/18269426575.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/amenaza_de_parto_prematuro_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/meravufukodudawiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/japiru.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/fofolosis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/batman_villain_joker_song.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006770.bin
14429ae17e35416294b07ac132fe9dc4fd63486373cf1853a34154f6f3cd24f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 5564 bytes
font_01_sfnt_off00007a46.bin
542191a1ced245398f75b36e2b910946ce3bcd265255885263e36844d30bd7ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 10596 bytes

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