Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d5087b49b5df415…

MALICIOUS

PDF

64.6 KB Created: 2020-08-12 02:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f153193c7156ab3776cdd8e37c65926f SHA-1: c2f9511cf73cf421fee4c70776f84bc3da5b4d1b SHA-256: 6d5087b49b5df41586ef2fbc8c5e08277c02d8a498fcedefa392d829077036f8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector URL to 'ttraff.com', suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Calendario serie b 2020 19 pdf' and the malicious URL, indicating a lure to disguise the malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=calendario+serie+b+2020+19+pdf
    • http://files.retreatatprairiewind.com/uploads/1/3/1/3/131379118/lujos-fanarejabu-mudiva-lizogij.pdf
    • http://files.lawyercma.com/uploads/1/3/0/7/130739212/6419860.pdf
    • http://files.kismetkidsyoga.com/uploads/1/3/1/4/131437074/4230936.pdf
    • http://files.marinasole.com/uploads/1/3/1/3/131379111/gofawobobonos_faladixetiboli_xutiwudumeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/89938111422.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/jezubufak.pdf
    • https://cdn.shopify.com/s/files/1/0434/2589/0469/files/70256438609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/jazipesemolib.pdf
    • https://cdn.shopify.com/s/files/1/0434/7559/9524/files/bevid.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2163/files/levimedi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/java_square_root.pdf
    • https://cdn.shopify.com/s/files/1/0445/6959/1967/files/vizimaletuki.pdf
    • https://cdn.shopify.com/s/files/1/0451/1078/8261/files/price_effect_substitution_effect_income_effect.pdf
    • https://cdn.shopify.com/s/files/1/0429/9590/8761/files/51691506143.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_off00009a12.bin
0e5cebea7be8289bd2061b5041fbabb0e9745e6df5aef5b54c94ddef56a4f4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A12 5560 bytes
font_01_sfnt_off0000acff.bin
6a51d5c3909721ead40cb2d3d3f378fec48c5379889166c1097f6c301d5e08dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACFF 16408 bytes
font_02_sfnt_off0000de7d.bin
2ab85f5f084fe11b94e74309fffab84832e8b82947a8819311f607ca1406fb96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7D 16064 bytes

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