Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5bc7942d519ce5…

MALICIOUS

PDF

116.5 KB Created: 2020-08-07 00:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edb35424f74f5e9afe8e92888ceeb48e SHA-1: ea757540566112fd4d64c48379aa67cac7722b58 SHA-256: 1d5bc7942d519ce58624b54a62e438d6a44aad4cd07031887dbcadb7d4f41a04
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=as+artimanhas+da+exclus%25C3%25A3o+pdf+download', which is likely used to redirect users to a malicious site.

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=as+artimanhas+da+exclus%25C3%25A3o+pdf+download
    • http://fudukomo.jharidingacademy.com/uploads/1/3/0/8/130813866/7861981.pdf
    • http://biribid.madeunderthemoon.com/uploads/1/3/0/9/130969573/sedixu.pdf
    • http://jisodin.crowdensatz.com/uploads/1/3/0/9/130969060/xazur_witaz_moluken_guretidixesepo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/tudamotuxegivoful.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/15364093391.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/dufavoxedo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/american_history_student_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/fosugirofigebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/13788166018.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zixetirubopejama.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/53619049210.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/lizilamusapopesedobekago.pdf
    • https://cdn.shopify.com/s/files/1/0435/4038/1855/files/2057023009.pdf
    • https://cdn.shopify.com/s/files/1/0437/2063/8632/files/denovawetitutexazira.pdf
    • https://cdn.shopify.com/s/files/1/0439/9228/5342/files/17727161184.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/64943299654.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/dreamweaver_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/7295/4269/files/4166785735.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_off000185a6.bin
68b656f8cf3edc405233634b50e6f5f1c5d43fea6f6298cdf3b24ca29c4cf78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185A6 5860 bytes
font_01_sfnt_off000198f4.bin
310cd560cc3713319519b4fe0988b2dfeba51207dc28338a4a0fe44bd3316f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x198F4 12320 bytes

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