Malicious PDF — malware analysis report

Static analysis result for SHA-256 6051460673c3fbf0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-19 16:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1c954b4e010f10a8ebedef24b164d8e SHA-1: 9b2fc42b032158a858ae333c1cdf489981b41e40 SHA-256: 6051460673c3fbf0b4c9008f7cd8f5a940f5fa4a4606074785189916463a7b56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link that is presented as a movie download. This link leads to a link farm, indicating a phishing or scam attempt. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of embedded URLs and the heuristic firings are sufficient to determine the attack pattern.

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=new+bollywood+mkv+movie
    • http://files.coupevillelions.org/uploads/1/3/1/4/131453484/rusabik.pdf
    • http://zabija.pdmcsc.org/uploads/1/3/1/3/131382595/d7f6a5c3711bdf.pdf
    • http://files.lightsoutbaltimore.org/uploads/1/3/1/0/131070718/1149199.pdf
    • http://files.thsbaseballdugoutclub.org/uploads/1/3/0/8/130874544/11d200ab54d032.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/gugupivuzoguwipezisijul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/teori_akuntansi_keperilakuan.pdf
    • https://cdn.shopify.com/s/files/1/0438/2123/6381/files/96847887177.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/71671710950.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/gubilepiforupu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3950/files/tefavaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/woputapejasazewimal.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/86124205206.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3709/files/13024807420.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/paxobisepinokome.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008030.bin
91960bb71efef6ff419733bd8888419a0a5e7337247e87d12ae1472a01015d9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8030 4916 bytes
font_01_sfnt_off000090f4.bin
1b399da19ff740d0e98f1fb4d9067307e8c1f22fd083bc539a79c6833ad6988c
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F4 10144 bytes