Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecc20b8a8ac6d5b…

MALICIOUS

PDF

44.2 KB Created: 2020-08-17 06:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 854961a5e9a9bbbac7c7be7e40a2d29a SHA-1: 995021ebdff358937c017d7a30a967d6a335e6b5 SHA-256: 6ecc20b8a8ac6d5bb6053ff7fd3b2965e33a742997918a12b0d95da8c849eb66
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to religious content to mask the malicious intent. The presence of numerous other PDF links suggests a link farm used to obscure the primary malicious destination.

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=baba+balak+nath+ji+bhajan
    • http://files.creativityandcats.com/uploads/1/3/1/4/131408103/8540161.pdf
    • http://files.glamourembalmer.com/uploads/1/3/2/6/132681560/8188632.pdf
    • http://files.customcellardesign.com/uploads/1/3/0/7/130776015/dad77d49.pdf
    • http://files.cosplayinkfactory.com/uploads/1/3/1/6/131637014/acb494bb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/auditoria_fiscal_e_tributria_crepaldi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/devowumaregepogilikobaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/gumudejuxokoxor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/67581857413.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0827/files/vifegalipakigulexosujedes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/cbr_test_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/biscuit_baking_technology_processing_and_engineering_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7438/8119/files/sibujoforobamowobotireg.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/full_block_style_letter.pdf
    • https://cdn.shopify.com/s/files/1/0452/0201/4357/files/variwipuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/85406714879.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/42732302207.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dae.bin
4dd9ab8f0bbe54a4220c11664697a0085bed1cd1f0c4a4bda24593438441f708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAE 4388 bytes
font_01_sfnt_off00005c79.bin
b726173bfa02782a14b48bfaf879fd1e623afda7c2d9dfd5e41f2232adc9c2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C79 14076 bytes
font_02_sfnt_off0000892b.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892B 4324 bytes
font_03_sfnt_off0000972c.bin
9e7b3c5cf5bdc0a8b008ec4146b589703e6b6792a1c9d2b8dd48e722011bcc39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x972C 3280 bytes

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