Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ddde533958cd53e…

MALICIOUS

PDF

39.3 KB Created: 2020-08-09 05:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8a29e63f6138028f3e7244cd3711cb0 SHA-1: 0944e2af61e7c6d06d0135edfd9f777ab6dce1f4 SHA-256: 0ddde533958cd53e5bf88e0d63cb4a3fb2e3b75ed85d6f16fcd798cf926ac8eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded links suggest an attempt to drive traffic to malicious sites, potentially for phishing or SEO manipulation.

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.ru/pify?keyword=appositive+phrase+pdf
    • http://files.myworklifeharmony.com/uploads/1/3/0/7/130775659/fifonekemeragit-mebitubigifunap.pdf
    • http://files.nataliemariaclark.com/uploads/1/3/0/7/130776149/4394719.pdf
    • http://files.kelleyintegrity.com/uploads/1/3/0/9/130970003/84a094c03d979a9.pdf
    • http://wekijewaw.swisswildlifeartist.com/uploads/1/3/1/4/131483281/533e7.pdf
    • http://files.reputationthompson.com/uploads/1/3/0/8/130874474/7416674.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/vedic_palmistry.pdf
    • https://cdn.shopify.com/s/files/1/0434/6976/6821/files/pidefozajadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0315/0499/files/74524980263.pdf
    • https://cdn.shopify.com/s/files/1/0435/6295/9006/files/sojabemagijadubobagakilid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/98808256241.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/71956120454.pdf
    • https://cdn.shopify.com/s/files/1/0436/6820/9817/files/list_of_english_synonyms_and_antonyms.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/3513157410.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/vuvanosenuxonomop.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3499/files/pozibazunujazosewiziw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/48034935441.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/42582456537.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd1.bin
8a0aeb6cbb3caf6964a13c5789b864b42aa83060fc78fa1b7c9c488f25d29960
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 5148 bytes
font_01_sfnt_off00006e56.bin
bd7718b0c946f6f5b97bc22aae3a01bec82881fd33338b8c36559ea3c45cc95c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E56 10088 bytes