Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed678c7cdb3d6c72…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 18:13:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc0001dcc79072c19d5c8835524ede45 SHA-1: 34bd37a3e5156d0cd0ae256379b48b92fcce9a9f SHA-256: ed678c7cdb3d6c7261e4baa2781552aa9d6ca8d6265743b50fdb5bf1a864fc90
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to known malicious redirector infrastructure (ttraff.ru). The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and a list of other URLs, likely part of a link farm designed to lure users to malicious sites. The presence of numerous PDF links, many hosted on Shopify, suggests a tactic to disguise malicious content within seemingly benign platforms.

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=lagu+b.+a.+p+wake+me+up
    • http://files.elpidashelterdogs.com/uploads/1/3/1/8/131856125/bekoluxarabifev.pdf
    • http://xugumafu.donesladventure.com/uploads/1/3/0/8/130814471/nataf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3547/6636/files/72110530932.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/9819332323.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/setulato.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/ziwobotufuzekatuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8419/3696/files/75114937183.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/30407614945.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/sulifiwowirepizogulivekun.pdf
    • https://cdn.shopify.com/s/files/1/0434/3051/0758/files/68816833666.pdf
    • https://cdn.shopify.com/s/files/1/0440/9524/2392/files/12520018474.pdf
    • https://cdn.shopify.com/s/files/1/0431/5889/6802/files/46465925939.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/tikobuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23631451812.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a27.bin
eb8a4e9c82fe273799ab24486e88b64fb24696f98350bbdd1d2bc0ba54078cf0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 4172 bytes
font_01_sfnt_off00006908.bin
ecc9964671001a8e773c4f1a65b106529b4eaf44d0765f1fe5f715c59bdc64fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 5104 bytes
font_02_sfnt_off00007a74.bin
3a510b0b9d5ea1657c9bdf9db952eb68aaaf981b14962e8b4acb84d7eb0eb619
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 13804 bytes