Malicious PDF — malware analysis report

Static analysis result for SHA-256 522d4f79f023b388…

MALICIOUS

PDF

43.8 KB Created: 2020-07-08 16:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baea9046442c506b37a3a166fe62ef6b SHA-1: 7f8fdc2f967e8d41cd64aef0d57754a4a18eaa0d SHA-256: 522d4f79f023b388f98a760d912291bc3ad02da1560dba20e1c402e4181248b6
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'Boy scout cyber chip worksheet'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, and the PDF_SEO_LINK_FARM heuristic indicates a large number of similar links, suggesting a link farm for SEO poisoning or traffic generation. The embedded URL https://ttraff.cc/pify?keyword=boy+scout+cyber+chip+worksheet is the primary IOC, likely leading to further malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=boy+scout+cyber+chip+worksheet
    • http://files.handorthopaedics.com/uploads/1/3/1/1/131163705/litijokemuf-wadililebumuwog.pdf
    • http://files.highdefsalon.com/uploads/1/3/1/4/131456012/xedegewe.pdf
    • http://files.honeyspringsfarm.net/uploads/1/3/0/9/130969931/woviriziwegu_defawob_razomebiguzimud_taresag.pdf
    • http://files.centralbrowardtransitstudymeeting.com/uploads/1/3/0/8/130874458/radini.pdf
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdf
    • http://files.unidadepastoral.com/uploads/1/3/1/4/131437351/195585ef.pdf
    • http://files.electaylin.com/uploads/1/3/2/7/132740320/8322645.pdf
    • http://files.808boogietcontest.com/uploads/1/3/0/8/130814189/wetuseputa-bedisome-lomukira-jobobaseludawag.pdf
    • https://suzixukez.files.wordpress.com/2020/07/fixoguxarawuzamewo.pdf
    • https://konivopuwu.files.wordpress.com/2020/06/81858686919.pdf
    • https://nemogodulivo.files.wordpress.com/2020/06/fowivoboja.pdf
    • https://pugawazolas.files.wordpress.com/2020/07/jilifumi.pdf
    • https://kamamubo.files.wordpress.com/2020/07/kusubamu.pdf
    • https://mogepor.files.wordpress.com/2020/07/kufujevotanilipabope.pdf
    • https://temutexi.files.wordpress.com/2020/07/97100268604.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gowavofopinesifaremoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3100392900.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006697.bin
ad0985f2997083173839b7f15ee731d07c89b5e93c29c1cc333b6736c4fc423d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6697 5000 bytes
font_01_sfnt_off000077cc.bin
eddbaec923dd5a07aa5b604bcc761923ab9c259e7a1909df331653db6763427d
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CC 13296 bytes