Malicious PDF — malware analysis report

Static analysis result for SHA-256 a728b262fbf35c44…

MALICIOUS

PDF

43.7 KB Created: 2020-10-17 08:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b93fae8f4f6fb218c4b445d413ba701b SHA-1: 5851510181cbf09ff96cdb7435565ad6104f32e4 SHA-256: a728b262fbf35c44cba8407ac93d72d6a30ff3fb6c2de3d932e7dfc0117d4941
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'cyberpunk games on android' and the malicious URL, suggesting a lure to drive traffic to the redirector. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly indicate this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/123?keyword=cyberpunk+games+on+android
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdf
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdf
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/zeviwoz.pdf
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/158214.pdf
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/21a22b9.pdf
    • https://uploads.strikinglycdn.com/files/29f4c3b4-0b2b-43d9-92b9-3f49bdb4cb6e/harry_potter_envelope_template_free.pdf
    • https://uploads.strikinglycdn.com/files/e9c956c1-6d5f-4de4-873c-89c1519da00b/73325273297.pdf
    • https://uploads.strikinglycdn.com/files/66be441e-a2b3-4c40-a88d-0433ed2cba0f/pugepu.pdf
    • https://cdn.shopify.com/s/files/1/0497/6050/1921/files/slow_shopping_thrapie.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/what_does_disposed_mean_on_a_ticket.pdf
    • https://cdn.shopify.com/s/files/1/0437/7509/9041/files/54439778083.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/red_heart_with_love_yarn_metallic.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/puckle_gun_for_sale.pdf
    • https://cdn.shopify.com/s/files/1/0497/5155/6260/files/how_to_make_a_dragon_scale_dice_bag.pdf
    • https://cdn.shopify.com/s/files/1/0497/8874/7937/files/mezabijewikuno.pdf
    • https://cdn.shopify.com/s/files/1/0266/9530/3355/files/34074072586.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/9845105637.pdf
    • https://cdn.shopify.com/s/files/1/0485/0368/5275/files/strengths_and_weaknesses_of_research_articles.pdf
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/kakobu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/99245760273.pdf
    • https://cdn.shopify.com/s/files/1/0499/7074/1416/files/rumikatetazezanosulo.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_off00006dd1.bin
081f840fbb61a40739e33db27ba35fff299fbd3c95f7182c100c3a5e32ff2bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD1 5456 bytes
font_01_sfnt_off00008047.bin
c9db5ff81ffc6b4b1252e648cee88383cb8e746ab4e4eb2d4f2ee7b7ec0587d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 9908 bytes