Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6911c51e804219…

MALICIOUS

PDF

35.7 KB Created: 2020-08-13 01:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5adf32afec8b1a996cb8b481820e92fa SHA-1: 715d0f440e633fa3d54da19c931a1be89a389e1d SHA-256: cf6911c51e80421985e25e2e55530cb9615d7d2392d4ec6bb1f86552bf0ad002
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. It also exhibits characteristics of an SEO link farm, with numerous embedded links to PDFs hosted on various domains. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, likely to blend in. The primary malicious URL is a redirector designed to lead users to further malicious content.

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=the+botany+of+desire+pdf+download
    • http://figob.sonjasweetphotography.com/uploads/1/3/0/7/130738531/fesejivuvolabapepili.pdf
    • http://files.polbacquet-photo.com/uploads/1/3/1/6/131636819/tevexedi_nurof.pdf
    • http://tukokew.holcombgc.com/uploads/1/3/1/8/131858685/wamejopawas_kafikigotofopup_sakesa_toruji.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/how_to_upload_to_dropbox.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/4778611063.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/1797193745.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/mazenakaralozidupinewowo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/7092642726.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/63872750275.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/exploratory_data_analysis_hartwig.pdf
    • https://cdn.shopify.com/s/files/1/0430/1222/7225/files/papipexikubepamulemunoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/xibuzagiteguwuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/zoven.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/niluwonugosige.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/how_can_i_electronically_sign_a_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/western_union_money_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/0553/3604/files/96128003685.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_off00004f42.bin
c51b98917400db62c3af7ff88862b1e76ea6f61d5fa22327ca39a96c57c26776
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F42 5412 bytes
font_01_sfnt_off000061ab.bin
b4276059d68e7ecc0a96182f90b4ce2a293308bdb2bbfd8c71c0c8b79eca4c9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61AB 9516 bytes