Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dc63e0c3cf0af7…

MALICIOUS

PDF

56.5 KB Created: 2020-10-28 15:57:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e12dc003851a3f2753b573285d63f7d2 SHA-1: 520e97e89548e5cad484d60d6213590e0ff7aecd SHA-256: 24dc63e0c3cf0af7ce0b34fe31c600fd08a042780e715b8fc3f682f1b6686550
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to link farms and redirectors, indicating a phishing or scam attempt. The primary malicious URL identified is https://gettraff.ru/strik?keyword=1+kg+gold+price+in+india, which is flagged as a known malicious redirector. The document body itself is heavily obfuscated but contains the malicious URL and other benign-looking PDF links, suggesting an attempt to disguise malicious activity as legitimate content.

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://gettraff.ru/strik?keyword=1+kg+gold+price+in+india
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f8986ed0491a.pdf
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/lalulelav-fuvebipepafufa-bijuvakobamijiw-kaxuxofexi.pdf
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/zomovud.pdf
    • https://nakoliveb.weebly.com/uploads/1/3/4/5/134503524/mupipafubasotiwera.pdf
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f928e6d981d6.pdf
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8ec3b3182fd.pdf
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/godoto-jubovebivowoze.pdf
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/xakubitopuxani.pdf
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5f8c45925b933.pdf
    • https://delidenaluno.weebly.com/uploads/1/3/4/4/134438050/ravanimite-wanuvin.pdf
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/duripetum_fagidiwizenovu_xezizu_fadumo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0497/4480/6042/files/hollywood_the_dream_factory_an_anthropologist_looks_at_the_movie-makers.pdf
    • https://cdn.shopify.com/s/files/1/0501/4693/4960/files/english_grammar_worksheets_for_grade_10_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0493/4438/1082/files/50691451165.pdf
    • https://cdn.shopify.com/s/files/1/0502/2439/8528/files/accumulation_distribution_line.pdf
    • https://cdn.shopify.com/s/files/1/0499/6120/5924/files/vosiwukesu.pdf
    • https://cdn.shopify.com/s/files/1/0482/7057/3729/files/csr_racing_2_mod_apk_new_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/musagokixerujiwesuto.pdf
    • https://cdn.shopify.com/s/files/1/0484/6845/9670/files/pudimuvetesasimug.pdf
    • https://cdn.shopify.com/s/files/1/0481/0080/2724/files/latest_who_tb_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0500/5839/5843/files/44896643867.pdf
    • https://cdn.shopify.com/s/files/1/0428/6378/8188/files/ramada_inn_greensburg_pa_new_years_eve.pdf
    • https://cdn.shopify.com/s/files/1/0501/2786/4001/files/tp4056_module_with_battery_protection_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0501/7462/3928/files/observational_learning_steps.pdf
    • https://cdn.shopify.com/s/files/1/0493/4418/4474/files/mafixotupipiguvipole.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000883e.bin
d72b55b898ce557c8a899d4d7ff488c6afdd9151c74c3c6a4a5865709a0d5f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x883E 5084 bytes
font_01_sfnt_off0000999f.bin
b704df36319353b783c5479505caad7495f2a4aab199c6378f2399d0ac8a314e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999F 11100 bytes
font_02_sfnt_off0000bfb8.bin
6f17b99764d671a96c0d2fd0b5f339513c2ddbf7efa5d755f63b897ad21dd613		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB8 16064 bytes

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