Malicious PDF — malware analysis report

Static analysis result for SHA-256 efbb1de3fc78e6a9…

MALICIOUS

PDF

37.0 KB Created: 2020-08-13 02:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10dd131c8aaeda4641acc8112ee92c67 SHA-1: 631016777ac1939d940a756dab5bc94117ba6681 SHA-256: efbb1de3fc78e6a92af6b7e0d636c9059fb6d8560eba1d02e2afb14a2481fd3d
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.ru', identified as a malicious redirector. The document body, though partially corrupted, includes the text 'Namaz ka tarika pdf download' and the malicious URL, suggesting a lure to download a PDF. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. The ML classifier 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.ru/pify?keyword=namaz+ka+tarika+pdf+download
    • http://xerag.uctcsrts.com/uploads/1/3/1/4/131406695/5998820.pdf
    • http://goram.dorseydeportfolio.com/uploads/1/3/1/8/131871729/5cf0a3c5c4f7.pdf
    • http://files.wkuprecollegepiano.com/uploads/1/3/0/8/130814984/xuxalesa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/hydrochloric_acid_msds_sigma_aldrich.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/14508644738.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/65250225336.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/gibiwokelulawemikorapiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/orders_of_adjectives_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/38193549220.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/78140173787.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/55550638638.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/67635082276.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/white_outdoor_lawn_mower.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/digiriduwepagujezogogija.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_off000046e2.bin
de2dcf87e094d9f7ccbdfd67bb5cb81dfa3f34eb42145d6b93b6c988fadc3845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E2 4852 bytes
font_01_sfnt_off0000575c.bin
0c9f18a9168abe43fa3ba763cb87f415fda1d7b62ff58aa7b6330a1e64303889		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575C 9888 bytes
font_02_sfnt_off0000793c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793C 4324 bytes

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