Malicious PDF — malware analysis report

Static analysis result for SHA-256 a848234e8886c999…

MALICIOUS

PDF

54.5 KB Created: 2020-08-13 21:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8036667c283c35861acc478debbdcced SHA-1: b87f2172340db38766a98850b45807ca1824394f SHA-256: a848234e8886c999e600171363a9ccce2e20813c0a3ce6e2e56dacd6b3fe2869
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the same as the malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious site by presenting itself as a helpful guide.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=brush+lettering+guide+free
    • http://tujez.easybillingsoftware.com/uploads/1/3/1/4/131454012/bf41bd77f.pdf
    • http://gasawevak.trinitybengals.com/uploads/1/3/1/6/131607063/xemuxo.pdf
    • http://files.notonemorealabama.org/uploads/1/3/1/6/131636965/39d2965f588307.pdf
    • http://vamemiman.heschinstitute.com/uploads/1/3/0/7/130775732/7e4c3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/51605134615.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/57514497718.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/concrete_batching_plant_layout_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/53979646809.pdf
    • https://cdn.shopify.com/s/files/1/0430/6904/6935/files/stardew_valley_quests.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/15504560439.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/bapuzitujer.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/winadiregelu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3393/4496/files/wuxodutobigifodiwewani.pdf
    • https://cdn.shopify.com/s/files/1/0440/1076/6486/files/adding_and_subtracting_fractions_worksheets_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/74847369685.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/misumanuzovebikevelomotiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/9241/4369/files/section_32a_of_registration_act_1908.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_off0000807b.bin
2d6d401189a0a7dfaf14298f1e3bd292940b3c29af019433d70b00e8e7eb342d
pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 5008 bytes
font_01_sfnt_off0000917e.bin
d68e6d188fea76a08696dd6889216b0e3abbb3205801f8a24080f4a210c94d8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x917E 10992 bytes
font_02_sfnt_off0000b71a.bin
75499cce6ae774eb1ed11ef55a8e4af94387e50334f2f733f224f7d1a8712777
pdf-font-stream PDF embedded font (sfnt) at offset 0xB71A 16192 bytes