Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf69ebfa2eccb42a…

MALICIOUS

PDF

47.4 KB Created: 2020-09-02 02:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b197f3b04c10f2e8075a8bd2ffb31f8 SHA-1: fe0ca8de67d6febbcd7f93a5662bba02f8a0b864 SHA-256: cf69ebfa2eccb42a24b64fff51a60503cbcea288c91eca379ce0a3b69eccc4f9
152 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=levantar+reporte+ingles. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and the target URL, indicating a likely phishing or malware distribution attempt.

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=levantar+reporte+ingles
    • https://static.usrfiles.com/ugd/9e41f0_e4ce47b34a614e2a80d46556680c88bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f7bb12d29b743c9abf28e12e6bdf93b.pdf
    • https://static.usrfiles.com/ugd/e2c250_32aad4843eec46d692d68b46bcd25b6f.pdf
    • https://static.usrfiles.com/ugd/682d1c_23f9f1b70a474153b9aa7dffbaa55d30.pdf
    • https://static.usrfiles.com/ugd/dc98cc_d6bc7eeb1857468693d6687339f30191.pdf
    • https://static.usrfiles.com/ugd/b8c837_3812a23079d74b67bbe662700c4bc0bd.pdf
    • https://static.usrfiles.com/ugd/b0b521_aba6cdee813a4ffdbe42743a5bc777b7.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/wabusak.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/32414627406.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/akiak_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/34093464328.pdf
    • https://static.usrfiles.com/ugd/3aca14_85a029bafc2c4d4284fe83b31d4d5b2e.pdf
    • https://static.usrfiles.com/ugd/3aca14_7669aa37880443a9ac442721abccf7e5.pdf
    • https://static.usrfiles.com/ugd/ea78e0_207fed06fd1a42b1a7181daf5ee43a5b.pdf
    • https://static.usrfiles.com/ugd/55f640_5b041db67dc4433abb1c2e97ec08ceab.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_off0000795b.bin
be8116719b9ede8b134385cc06f7cc2fa95655f1530e4c8fd95440a859fc82cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x795B 4988 bytes
font_01_sfnt_off00008a70.bin
6b95cc5c450bfa01440595a9b09b5a98a0d99b23a5c885d99dcbe35e42b641a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A70 11728 bytes