Malicious PDF — malware analysis report

Static analysis result for SHA-256 7891febf71e3694d…

MALICIOUS

PDF

53.9 KB Created: 2020-08-14 02:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0bb091beb83942fc35007b4f00f28e0 SHA-1: 2ffdbb92327bfe2ae77fbcae9e5c9a2a43f5fa22 SHA-256: 7891febf71e3694d3a7d75e2269b2b2174d5261be7b852896c4dba2f9230e139
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=java+programming+full+notes+pdf', is flagged as a malicious redirector. The document body and heuristics indicate an advance-fee scam lure, presenting itself as programming notes to entice clicks. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=java+programming+full+notes+pdf
    • http://zinid.stuart.boundlessgym.com/uploads/1/3/2/8/132814930/wonapulexovubim_garaw.pdf
    • http://files.sacramentoatcurrentspeed.com/uploads/1/3/1/4/131413718/gojop.pdf
    • http://vixiximev.angeladaley.com/uploads/1/3/1/6/131606407/1b71e0e332280.pdf
    • http://files.warriorbused.com/uploads/1/3/1/4/131453100/jalepafulalafeg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/dujufidirakupefitaxojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25424470269.pdf
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/84214969369.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/how_to_multiply_matrices_2x2.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/14542909960.pdf
    • https://cdn.shopify.com/s/files/1/0430/8251/4585/files/alif_episode_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0209/3987/files/sadilanubotudi.pdf
    • https://cdn.shopify.com/s/files/1/0450/8676/9304/files/thermodynamic_equation_of_state_derivation.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/ccna_full_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6423/files/64784823939.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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006670.bin
b12ac7c83cae7dcf8001039d4b48016ec4e71c07869e7e92c814fe0912ae2b27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6670 5412 bytes
font_01_sfnt_off000078c1.bin
c624dbbd26d28bb237d61ba4a626d38574896a9ddf6e234aa4992c5fe18d4685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 3396 bytes
font_02_sfnt_off00008607.bin
026de1076dad6614fee7b4839f066e743e4238b5ddea94259138cfcd618330b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 2320 bytes
font_03_sfnt_off00009059.bin
12fb35ec5e32960e2b4221c12f20bbf0bf607b435c1e92bdbcab75d325b43f6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9059 10408 bytes
font_04_sfnt_off0000b432.bin
7a7e0f9cb89785dee93ecfbcc78ef93b5a18a5022886c2d5a0bf15d9412c15a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 16224 bytes

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