Malicious PDF — malware analysis report

Static analysis result for SHA-256 871c8fb94f7fa926…

MALICIOUS

PDF

54.0 KB Created: 2020-08-11 07:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3adbd770f765f40bf65169de4c37ea8 SHA-1: 39d1b41e8c88b6abf90d79eff8445597816b84a4 SHA-256: 871c8fb94f7fa926e80bfba784e78fd8e11864bca6d1a5f5a0e6e723a04e6116
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Tulisan arab asmaul husna dan artinya pdf'. The presence of many external PDF links indicates a link farm or redirection scheme designed to lead users to malicious content.

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=tulisan+arab+asmaul+husna+dan+artinya+pdf
    • http://files.revelstoketheatrecompany.org/uploads/1/3/1/4/131436956/lofiwetegajo-diner.pdf
    • http://files.dkgthetaomegaca.com/uploads/1/3/1/6/131607075/6114683.pdf
    • http://files.5wmadison.com/uploads/1/3/0/7/130740586/dixunomoxudu.pdf
    • http://files.margaritagerouki.net/uploads/1/3/0/9/130969370/ripirawovubusidevix.pdf
    • http://files.virginiakelly.net/uploads/1/3/2/6/132682039/3444098.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/78087521802.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/boposovubodolux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/wewamiredaxuwevopuvag.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/xatofaxukogavepa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2310/4160/files/regunafepuxulaguw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesujegixaxufusataxa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/vuvav.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/cd4069_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/93740127891.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5902/files/30014091339.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85286147205.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/dazuvimibejoronebifa.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009869.bin
64fda480329feeef353740968b171dc3497fff886701db9a1c2dc7b3416780bf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9869 21116 bytes
font_00_sfnt_off000064fe.bin
dc0f92d509f6dbaed4b76042754e079ef5d6b014827fee0b382cf628d4c7c5a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 5128 bytes
font_01_sfnt_off00007624.bin
7d0bc1336eb1ae5ec69ad967c426fa98701cdc64d354649aa7919812b7be386d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7624 9964 bytes
font_03_sfnt_off0000bc53.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC53 4324 bytes

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