Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe8845c7152653a…

MALICIOUS

PDF

56.6 KB Created: 2020-09-06 06:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 203946aa0ce05d7b3e73fbd8962f9ee4 SHA-1: c2bcc8fa3ba2def737a16a4dc855aef5e927f6be SHA-256: efe8845c7152653a3fdd49ef64478effe8328c6adf470e03d154b3d298b7992f
154 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 'https://ttraff.me/wix?keyword=balidan+odia+movie+song+free'. This URL is presented within the document body, disguised as a link to movie songs, which is a common lure for phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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.me/wix?keyword=balidan+odia+movie+song+free
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/60751092344.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/tetanoxodikifivat.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/29799391507.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3767/files/balancing_equations_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/ielts_trainer_listening_test_3_answers.pdf
    • https://static.usrfiles.com/ugd/e33828_ea259780019949f29e72848d63816eaa.pdf
    • https://static.usrfiles.com/ugd/7baf93_99b460eaa9e0430486e18e18cbd2bebe.pdf
    • https://static.usrfiles.com/ugd/09273f_4379e58e5f0946598c9f4cc23c86b8f0.pdf
    • https://static.usrfiles.com/ugd/98d639_83ec82f4f81c4cc4b28a926d3c08513d.pdf
    • https://static.usrfiles.com/ugd/253000_18147c0b40af4ba6aee7257effcbead2.pdf
    • https://static.usrfiles.com/ugd/b77b08_91acd8831ef54554b2f79bfbbf22c58d.pdf
    • https://static.usrfiles.com/ugd/ce14f3_ae9ec2fc98214b018f661056fe2e4d52.pdf
    • https://static.usrfiles.com/ugd/fd7405_c4ef48840c7145c785b02acd45f2dd3f.pdf
    • https://static.usrfiles.com/ugd/5bf82b_8c739d85cad94f7a810d0d293b7b6770.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/dotnet_cli_templates.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/asfixia_perinatal_oms.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/34536544563.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/50464054777.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/catechesi_tradendae_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f4.bin
e05aa0586eacbdca750784e2a4eec924b433ecff31ddc5b57d85ac76f447b10d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F4 5044 bytes
font_01_sfnt_off00009201.bin
40fcfe43eb10a6c6386f09b58b55b9e20e1d0863152baa8449e33231142b1a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9201 16416 bytes
font_02_sfnt_off0000c527.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC527 4324 bytes

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