Malicious PDF — malware analysis report

Static analysis result for SHA-256 e679f639fddfea1c…

MALICIOUS

PDF

34.4 KB Created: 2020-08-27 23:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f584d5b7185478eaf767e29365635ae2 SHA-1: 1ccf38fd54d4c1970af6e524f01f84f7120c2ac9 SHA-256: e679f639fddfea1ce1d5c8e67fa5688f216f17e589510f1cf4bb2351de5b167b
152 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'piano sheet music' and includes the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=ashitaka+and+san+piano+sheet+music+free
    • http://jubixu.samuelbloch.fr/uploads/1/3/1/1/131164250/e14e16e48eb9c1.pdf
    • http://files.pacref.com/uploads/1/3/1/8/131871704/09800.pdf
    • http://files.elizabethneily.com/uploads/1/3/1/0/131071129/526341378f3.pdf
    • http://files.royalgymnasticsmobile.com/uploads/1/3/1/4/131437676/zakefibosedejozoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/77402002016.pdf
    • https://cdn.shopify.com/s/files/1/0462/4675/6506/files/debentures_payable_in_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/behavior_modification_theory.pdf
    • https://cdn.shopify.com/s/files/1/0465/1204/6230/files/16904512372.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/bufone.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/47932885136.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/96354373384.pdf
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/subtracting_mixed_numbers_with_like_denominators_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/3949/6094/files/40562956793.pdf
    • https://cdn.shopify.com/s/files/1/0438/4528/8093/files/sbi_new_atm_card_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/6020579274.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetuvoveluganimuwejipas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/povijaxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/65363124489.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_off0000487d.bin
7d891013b4eb64352a294487a31f9519f9c2f8a23142b6ebdf33dc9e9fa58dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x487D 5416 bytes
font_01_sfnt_off00005aad.bin
f2bdb653ded8c7f603eab392f40ddda74b1ee06824b21cbde04343cfef70a671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAD 9816 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.