Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2799de037a209d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-10 18:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3701e0cc553cb7ae535b880ad81d62f3 SHA-1: bb4a2297fbb398ecc78cfe7cf057ddc6f31d7b56 SHA-256: dd2799de037a209da80bf0f9389598fd70a8444783f708f3d388e3dbbe0657c0
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=define+issued+share+capital+pdf, which is likely used to funnel victims to further malicious content. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

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=define+issued+share+capital+pdf
    • http://files.tallcitytint.com/uploads/1/3/1/6/131636903/pubumofi_sokizegarobo.pdf
    • http://files.paharidgefriesians.com/uploads/1/3/1/1/131164081/ropiwuxuz.pdf
    • http://files.innovatingforeducation.com/uploads/1/3/0/7/130776755/wuliwowi.pdf
    • http://dubaxi.shaffers-ships.com/uploads/1/3/1/4/131437792/kezajurorigadatexuza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/30135474588.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0309/files/botulijaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5425/9606/files/rawazajodixan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/21282647638.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/6455912061.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/wazikorovuwev.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/18079542708.pdf
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/22831960041.pdf
    • https://cdn.shopify.com/s/files/1/0431/3962/9218/files/manixajakaremibojiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/38690861495.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/32756481239.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6565/files/sepunipixov.pdf
    • https://cdn.shopify.com/s/files/1/0435/3615/4773/files/lspdfr_callout_manager_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/wizofewapepapuwupibux.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_off00006316.bin
f9098efcf4d4483801f5372b360094226c92112c5ac705f19c10b1f5a52403ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 5240 bytes
font_01_sfnt_off000074e0.bin
e2d4ddeda71482f7fc35e78db4b7432ca47d300e824700c7657d8ded4a32466d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 14212 bytes

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