Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a4a736c32e7a64…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 17:27:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 897295d92d4e2c36e293ea371a3a25cb SHA-1: 13736c2da26516b202caaf5291eedc0b79b2dfd5 SHA-256: 41a4a736c32e7a6413eab7279a645815426deafc27a71a05fd8898145c85d5f6
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, related to 'Android one lock screen wallpaper'. This suggests a phishing or scam attempt to redirect users to malicious infrastructure.

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.com/pify?keyword=android+one+lock+screen+wallpaper
    • http://worov.brsales.com/uploads/1/3/0/7/130776485/nolitobasikare-luwapos.pdf
    • http://files.alessandrodovis.com/uploads/1/3/2/7/132740458/weberavufidudisow.pdf
    • http://xolifu.derekkalp.com/uploads/1/3/0/7/130776089/3631cce78a3.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/47156414581.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/the_avengers_watch_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/8818/1400/files/49380889419.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/wanotobopajituvemof.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/wadedaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/xisaxolafatesikosanon.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/microelectronic_circuits_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/vunupuduna.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/blood_group_types.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/38382556033.pdf
    • https://cdn.shopify.com/s/files/1/0446/1549/9939/files/enlaces_quimicos_covalentes.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/50142806740.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_off00006ab7.bin
801667c71a30bd456a8ffcefc0a38705299750589b60fcfd52b08de4d5ebc39b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 5212 bytes
font_01_sfnt_off00007c89.bin
12e7407910ec0606ab1da93f093b7f3caa2432e92b8809cf6ef8ef494caeeb5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 10288 bytes

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