Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ce00a90c85258c…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 22:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e77030d324922d91d51daa9504ce49f1 SHA-1: 39ad11c702b2bf0521118b3f94527faef2530dca SHA-256: 30ce00a90c85258cadd233e2b31a8e9ca16961d44d7f55d7d4efc16d8686f206
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Friendship images tamil hd' and the malicious URL, suggesting a lure. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm for SEO manipulation or distributing malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=friendship+images+tamil+hd
    • http://files.3rdgearwaseca.org/uploads/1/3/0/9/130969728/dezojutugabaj_nodomadiluzek_nutilixivubaxi_kekibubijenales.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/jazidewibur.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/61936600465.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/sowamezadupikomafoxaruxil.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/sewebumerupuvefitemogun.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/36394217267.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/vowazatuteleju.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/princeton_review_sat_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/jutososuxejawiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6632/files/bimedivixozexaketafafuke.pdf
    • https://cdn.shopify.com/s/files/1/0440/3606/3397/files/69455721822.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b2a.bin
251782044582505808f75dacd7614acc483048da2fb79f77e88426700646ee46
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B2A 5008 bytes
font_01_sfnt_off00005bea.bin
73983ccd477f0e4c07634362c0f9f13a23cea415a26bff37f7f125d59a681190
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEA 1936 bytes
font_02_sfnt_off0000652d.bin
16d40690895d94370c45cb058ee953c10566f555e35fc0aa14b5f3d7bb22314f
pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 10876 bytes
font_03_sfnt_off000089ba.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x89BA 4324 bytes