Malicious PDF — malware analysis report

Static analysis result for SHA-256 0240ed49e9475246…

MALICIOUS

PDF

73.9 KB Created: 2020-07-29 05:40:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515c82e6b033e339932d397fd2fcdce6 SHA-1: ebc5bfce5842ca4bf727077f2decb515d02a44ba SHA-256: 0240ed49e9475246fa7425c84bcc8955198f6d3804e3832c1f05f7c3a8d3a94f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a link farm suggests an attempt to distribute malicious content or phish users.

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.cc/pify?keyword=album+fall+out+boy+american+beauty
    • http://files.elementalgifts.ca/uploads/1/3/1/4/131453917/pakuk.pdf
    • http://files.upshotsolutionsllc.com/uploads/1/3/1/4/131438477/4483720.pdf
    • http://files.rhythmsofgraceuk.org/uploads/1/3/1/3/131398573/sufavexezogata_lotipaladem.pdf
    • http://files.tomhelp.us/uploads/1/3/0/7/130739974/laravukowinabiwudad.pdf
    • http://files.joycedesignsolutions.com/uploads/1/3/0/7/130775063/xewitenibim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/gitovogeduguviv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/nuvazogitudezisabuwitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/14121552417.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/88264452953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/vezogebaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/63137646500.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/26191503814.pdf
    • https://cdn.shopify.com/s/files/1/0438/8811/5867/files/gaxotabitakokedetoro.pdf
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/71856608528.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/zuwaraxufofil.pdf
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/10627823858.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc95.bin
d0e23637adb347ca02fc5f2f4ae1f9b6b4b44a27f09f00ebdc5e0235db8ecc36
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC95 6056 bytes
font_01_sfnt_off0000e13d.bin
3bc24b22f388ebf21ad9bc97e34b10e37a4fa8c1cdff0307a606f9ec858e8eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 4960 bytes
font_02_sfnt_off0000f20b.bin
4c9b0abe6a2bea7e3641c0c2cf19d42e9f9754c39fac0fdd4c7d8a0d7c540823
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11980 bytes