Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09811cca31a957f…

MALICIOUS

PDF

38.0 KB Created: 2020-08-27 13:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d25f321e99e28df671bc871c6daede77 SHA-1: 3ecb1e59e0f68aa0806173d4ce0191aca6db5f0e SHA-256: a09811cca31a957f93708d45fea224e03db82807cb3d3b3ec3aff3ce0c0b591e
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains the URL that triggered the malicious redirector heuristic. The presence of a large link farm suggests an attempt to manipulate search engine results or to distribute malicious content through a network of linked PDFs.

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.me/pify?keyword=bir+f%25C4%25B1rt%25C4%25B1na+tuttu+bizi+zara
    • http://zapizejop.mathiasscarborough.com/uploads/1/3/2/6/132695829/zajefilo.pdf
    • http://tafibegu.barebearbutter.com/uploads/1/3/0/7/130776208/7454157.pdf
    • http://tamadurum.mhrspl.com/uploads/1/3/0/8/130814328/mewagupop-rilezaromiwof.pdf
    • https://cdn.shopify.com/s/files/1/0429/8879/8111/files/58796504011.pdf
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/termux_bitcoin_mining.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/exercice_orthographe_cm1.pdf
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/nofezaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/golang_while_loop.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/rewufenewitoderoxagabu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/fexakewafapuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/lakak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/52428360440.pdf
    • https://cdn.shopify.com/s/files/1/0464/4903/3384/files/tobetagumifosolef.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/15437195127.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/baltimore_ravens_vs_jacksonville_jaguars_live_stream.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_off0000482b.bin
cef39062d266d99c947da80cae0a63ec118fafee17dfb12109840233b935afa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482B 4476 bytes
font_01_sfnt_off00005763.bin
dd7f0b0d10c87512460482337ae7bebd26f57ae74cae5b8e640b77dae2c19250		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5763 11552 bytes
font_02_sfnt_off00007b26.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 4324 bytes

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