Malicious PDF — malware analysis report

Static analysis result for SHA-256 500747a6471a87e4…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 09:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afbf821a970ee1061d0ed0008a416c61 SHA-1: 9bbfda96c1b50b5783230da0bf13258c3f61d31f SHA-256: 500747a6471a87e41482b23d6c2d7ad742d42dcc3aeff186ea6942426da4219f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL `https://ttraff.cc/wix?keyword=balettan+molalledi+song++wapmallu` is identified as a malicious redirector, and numerous other links point to PDF files hosted on Shopify, suggesting a link farm designed to manipulate search engine results or distribute further malicious content. The document body contains garbled text but includes the malicious URL and a benign-looking PDF filename, consistent with a lure.

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.cc/wix?keyword=balettan+molalledi+song++wapmallu
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/makajonukoboramuwejokide.pdf
    • https://cdn.shopify.com/s/files/1/0435/9775/8622/files/a_remarkable_beetle_mini_ielts_reading_answer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0434/4699/3052/files/cambium_cnmatrix_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/jemetapikupaleremazi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/28356550513.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/erster_verlust_schumann_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1541/2632/files/51422819714.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9829/files/the_great_book_of_best_quotes_of_all_time.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sufekiwoliwobimuwidiniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1703/files/11266170306.pdf
    • https://cdn.shopify.com/s/files/1/0437/6641/5514/files/zidakexezamenemoxasa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/chad_kroeger_hero.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/fobuwemoguxekidosobikiv.pdf
    • https://cdn.shopify.com/s/files/1/0438/3175/4902/files/72266490252.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/mitujajupusaxelavem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/affidavit_of_support_sample.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_off0000513f.bin
5b1f5d2f61d70b6e5bd51707d042fb7a551129826941330b601977d0e3a88d10
pdf-font-stream PDF embedded font (sfnt) at offset 0x513F 5324 bytes
font_01_sfnt_off00006362.bin
559783362ef58e6af8286b67655a8194ad7af503544099479f7e1dd5314ae477
pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 14476 bytes