Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a82da1a3bb68e5…

MALICIOUS

PDF

40.2 KB Created: 2020-08-17 10:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31e10ac9c5235a962bce88213f24f68c SHA-1: 50c0d9445dc967fd67833d8c1926ac11d89dffbf SHA-256: d2a82da1a3bb68e55b3240b4ffbafe5560a7ffe37c383ed70ccf671d61cc0768
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector (ttraff.cc). This redirector likely forwards the user to a malicious site for phishing or malware delivery. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector and a large number of external links suggests a delivery mechanism for further compromise.

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.cc/pify?keyword=beetle+crazy+cup++pc
    • http://tetofa.lynnshuck.com/uploads/1/3/0/7/130739163/kitekufe-posakiwiribapil-pifep-wuzowalar.pdf
    • http://temulig.friendsofcarrollpark.org/uploads/1/3/1/3/131398140/3482668.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/3572667288.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/kobuzufigepinutoxudopoju.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/john_deere_gx85.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/lavufibarupapelivosuju.pdf
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/adventure_quest_worlds.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/common_acids_and_bases_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6635/files/presentation_skills_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9941/files/bedroom_vocabulary_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/convert_avi_to_wmv.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/xogumop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4188/1254/files/fetenuzogedoxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/kerala_budget_2020_download.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_off00005fc3.bin
bdc03f7c4a4b3afc6eda8b296319582d893619c6e8c554a4fcf063907fec4021
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 4948 bytes
font_01_sfnt_off000070b7.bin
a8cb79a897cab1e138ecae4af995d45d2f785b0a5a73914b455b1682950b63df
pdf-font-stream PDF embedded font (sfnt) at offset 0x70B7 10368 bytes