Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5495b00f8736842…

MALICIOUS

PDF

50.5 KB Created: 2020-08-22 13:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dd1c578f5399a80f67e4a37e727c32d SHA-1: 9472652fbfb066cbc1417b03d6e2ed108d6ae4a8 SHA-256: c5495b00f87368422ea48cacbd9f73d3e1cd6d220916807405290b66c2e0b502
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, disguised as a community service log sheet. The embedded URL https://ttraff.cc/pify?keyword=printable+community+service+log+sheet+for+court is a known malicious redirector. The document also contains a PDF link farm heuristic, indicating it's designed to host numerous links, likely for SEO poisoning or to distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=printable+community+service+log+sheet+for+court
    • http://xisuk.lutheransanjuans.org/uploads/1/3/1/6/131637814/jubunaku-derizuxexaniro.pdf
    • http://lemizufon.celestejohnsonlpc.com/uploads/1/3/0/9/130969264/79f2606c.pdf
    • http://dexosa.newenglandpsychological.org/uploads/1/3/0/8/130814328/lojuli_puvovili.pdf
    • http://files.hooahhillfarm.com/uploads/1/3/1/4/131453615/78347cad6.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/kuwafilepajijoriw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/4598314676.pdf
    • https://cdn.shopify.com/s/files/1/0435/8609/3214/files/immunity_to_change_map_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/80982433434.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/clawhammer_banjo_for_the_complete_ignoramus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/75954597273.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7461/files/bosch_serie_4_washing_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/sovodetadigonujunavapa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/wamidul.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/rental_agreement_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0465/3491/8302/files/import_external_style_sheet_in_html.pdf
    • https://cdn.shopify.com/s/files/1/0432/3409/9362/files/vinijemiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/37300957195.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jazaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d9.bin
4c6de15b1ef6df9a16700d648247e45f35468e63c1b5a354d720b0470a2e6672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D9 5480 bytes
font_01_sfnt_off00008b52.bin
e7aaa5a998ee2c7087ca33907a8756cbb479053f58a45aa6067c909326cb78e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 10364 bytes
font_02_sfnt_off0000aeb4.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB4 4324 bytes

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