Malicious PDF — malware analysis report

Static analysis result for SHA-256 4954b9623e335227…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 11:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12358eaa11f3676f4862d2b3639ab9b3 SHA-1: 3f9ef8f0091326ff67176513ab2aaba89bb07aec SHA-256: 4954b9623e33522718b31e3dd0b8121e6d8409b58fd5211a793866e5e88f72be
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One of the primary links, 'https://ttraff.cc/wix?keyword=edge+of+the+empire+no+disintegrations', is flagged as a malicious redirector. This suggests the document is designed to direct users to malicious infrastructure, likely for further exploitation or phishing. 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.cc/wix?keyword=edge+of+the+empire+no+disintegrations
    • https://static.usrfiles.com/ugd/9d66c7_1cde54abbbd140bd9491a2f2c812ba23.pdf
    • https://static.usrfiles.com/ugd/b8c837_3735ce45cf8d44ada527c25b3cb95de9.pdf
    • https://static.usrfiles.com/ugd/696b8a_2880de251f7d4d538fbd62d08a730e0a.pdf
    • https://static.usrfiles.com/ugd/0779a3_8e094ff621234137abb9384095071d71.pdf
    • https://cdn.shopify.com/s/files/1/0440/9737/2312/files/nitapulevetivipez.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/pepiforegolomilagana.pdf
    • https://cdn.shopify.com/s/files/1/0438/5816/5925/files/guided_reading_lesson_plans_kindergarten.pdf
    • https://static.usrfiles.com/ugd/158fb9_7a3c7eba75734760b001481fec57772b.pdf
    • https://static.usrfiles.com/ugd/b8c837_70d56713e71d4e3aae5aa0a3bb22e27b.pdf
    • https://cdn.shopify.com/s/files/1/0437/7165/8392/files/75791899833.pdf
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/games_like_ourworld.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/forza_horizon_4_car_tuning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0131/4454/files/adobe_after_effects_cc_keyboard_shortcuts.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_off000063d8.bin
dfe078d887d8ea5d288f72f5de5a90d8439977f3fe8db0bab30e55a14e48a0bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 5380 bytes
font_01_sfnt_off00007600.bin
261b86d0a78d9c4e98f92fc8eb7b922d927eed4579a8906c3601e5eaeea2e61e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 10600 bytes