Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e89611b789598d6…

MALICIOUS

PDF

63.9 KB Created: 2020-09-11 08:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa19e5f0d961b27a08f7a7fb49d57e7f SHA-1: 74399522f88b2062b0ddce132a16b88db2c3e612 SHA-256: 8e89611b789598d6693cfe1cd6ed95c3f18ba11b283aa30ad415e455213d0eb7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=bootstrap+4+radio+button+form'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'http://furifeba.txclo.org/uploads/1/3/0/9/130969335/a69bc3cdda.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting a social engineering lure.

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.club/wix?keyword=bootstrap+4+radio+button+form
    • http://furifeba.txclo.org/uploads/1/3/0/9/130969335/a69bc3cdda.pdf
    • http://files.gwendolyndanielsmusic.com/uploads/1/3/1/4/131454420/a92927825a.pdf
    • http://bogos.hairymosquito.com/uploads/1/3/0/8/130874435/70aef2b173c94c.pdf
    • http://rimog.virginiashowmasterscircuit.com/uploads/1/3/1/1/131164250/biralafakogom.pdf
    • http://furifeba.txclo.or
    • https://static.usrfiles.com/ugd/43d598_a4831557b9654217b930a994ad0e6e0c.pdf
    • https://static.usrfiles.com/ugd/5262df_645dd1d254c84ca489bc2722ef052b45.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/lirig.pdf
    • https://cdn.shopify.com/s/files/1/0446/7779/1897/files/zagizovokenimuvaxilelol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8697/files/zipobonusisejiba.pdf
    • https://static.usrfiles.com/ugd/7ad284_b10f0d4830d74a56b45f0e2366210a5c.pdf
    • https://static.usrfiles.com/ugd/a44510_e7bb55ffcbac417dad106d6455a5514a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9fef6998794846d1a3f7112cc3b3cd04.pdf
    • https://static.usrfiles.com/ugd/c75f60_83fac2d7e09f49df87e7b8594548bb4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_438e1362bc0744e18a14f7939ea4c637.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_off0000aaba.bin
f6a011144e9ac44b6a147fe09a8099864c4b12f928ab0e7b32be7ea4e9397bf2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAABA 5432 bytes
font_01_sfnt_off0000bd20.bin
74d1fe967e719758507599916ec6ac887a005d0dbdbf1fd9dc07f5189605f906
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD20 17648 bytes