Malicious PDF — malware analysis report

Static analysis result for SHA-256 844427248665e527…

MALICIOUS

PDF

65.1 KB Created: 2020-08-05 01:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1badf9a7d21055a43eb260d5a1b10b09 SHA-1: a27672b87c938e78e647c82f8a02e1f89767215c SHA-256: 844427248665e527348537682ad9495216ade47edf8503b0838c84b5ecc5e2d9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The document contains a lure for an advance-fee scam, presenting itself as a free PDF reader download. It embeds numerous links, including a critical redirector link to 'ttraff.cc', which likely leads to malicious content or further scam pages. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=best+free+pdf+reader+for+ipad+mini
    • http://files.fourthelementparanormal.com/uploads/1/3/1/1/131163969/wexokoliso.pdf
    • http://files.paulsullivanleather.co.uk/uploads/1/3/1/4/131413678/5cb7ddd.pdf
    • http://files.createdigitalpublishing.com/uploads/1/3/2/6/132695472/soluwanutakeg_nonaget.pdf
    • http://files.livingwellstudios.com/uploads/1/3/1/3/131384429/359346.pdf
    • http://files.stowemusic.com/uploads/1/3/1/4/131410606/fobajuzug_vagefasojatila_pifom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/rodip.pdf
    • https://cdn.shopify.com/s/files/1/0437/9118/8117/files/47265413558.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1362/files/ashrae_90._1_si_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/41298574021.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/bafeni.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9173/files/atresia_colon.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/18122156882.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/24663175667.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/tv_azteca_m3u.pdf
    • https://cdn.shopify.com/s/files/1/0437/0373/0329/files/samovuvixideluxil.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/mexogonuzij.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/55917323903.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000099ea.bin
c1e7fd1e01dda32bd300f46e7b2a881d3f55cbc99469358c1352453d84bba232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99EA 5204 bytes
font_01_sfnt_off0000ab7f.bin
7a02da73c5ff24218d04b188db7d31ceb9303d5dedd43b645f18a615a19d9b6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7F 6068 bytes
font_02_sfnt_off0000bb30.bin
94bcecda2244951b83e7b38c86716545e6951b1cb1c591729d7b2c4d4016a451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB30 10976 bytes
font_03_sfnt_off0000e0dd.bin
40b4972c50c88d393489be5bde3d81a1619b37e5b87fab5a2fbd656868057354		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0DD 16108 bytes

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