Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedb16a0120ffcc1…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 01:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81992eadab70130120e163fba00a8d5 SHA-1: 2db0f05ba7eacc97081197c4aa8d3f9584deaad7 SHA-256: bedb16a0120ffcc11d459c14e74104261bd6d8b1099fb5069afd1b284e815eed
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL and the link farm structure indicate a probable phishing or malicious redirection attempt.

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.ru/pify?keyword=blattformen+pflanzen+bestimmen
    • http://gerewewit.kristamaysart.com/uploads/1/3/0/8/130814328/wanigebivore-sobuginidapega-gakanomuketif-pixafofinekoxu.pdf
    • http://files.latebirdradio.com/uploads/1/3/2/6/132696263/zawapo_wuxapetoxi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0352/5794/files/game_basara_2_heroes_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/xixipomiretatanopixija.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/divemoxoreratagupivegur.pdf
    • https://cdn.shopify.com/s/files/1/0440/4543/5030/files/5875740639.pdf
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/86988412905.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/ditimifuxuxidowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/83324288303.pdf
    • https://cdn.shopify.com/s/files/1/0444/1381/2903/files/american_slang_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.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_off00005a92.bin
bec05f5f10e6ac232842d2aedeed462680864184e6a81b34826dd925aa0ada3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A92 5284 bytes
font_01_sfnt_off00006c74.bin
a6d65c0b349649ca3e0f93e6dd947303dd286a42f1b31f7e26baa9501475adcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 11396 bytes

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